Calculate and Count All the Factors of 1,978,020. Online Calculator

All the factors (divisors) of the number 1,978,020. How important is the prime factorization of the number

1. Carry out the prime factorization of the number 1,978,020:

The prime factorization of a number: finding the prime numbers that multiply together to make that number.

1,978,020 = 22 × 35 × 5 × 11 × 37
1,978,020 is not a prime number but a composite one.

» Online calculator. Check whether a number is prime or not. The prime factorization of composite numbers (decomposition into prime factors)

* Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
* Composite number: a natural number that has at least one other factor than 1 and itself.


How to count the number of factors of a number?

If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, ....

Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1)

In our case, the number of factors is calculated as:

n = (2 + 1) × (5 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 6 × 2 × 2 × 2 = 144

But to actually calculate the factors, see below...

2. Multiply the prime factors of the number 1,978,020

Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.

Also consider the exponents of these prime factors.

Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.


All the factors (divisors) are listed below - in ascending order

The list of factors (divisors):

neither prime nor composite = 1
prime factor = 2
prime factor = 3
22 = 4
prime factor = 5
2 × 3 = 6
32 = 9
2 × 5 = 10
prime factor = 11
22 × 3 = 12
3 × 5 = 15
2 × 32 = 18
22 × 5 = 20
2 × 11 = 22
33 = 27
2 × 3 × 5 = 30
3 × 11 = 33
22 × 32 = 36
prime factor = 37
22 × 11 = 44
32 × 5 = 45
2 × 33 = 54
5 × 11 = 55
22 × 3 × 5 = 60
2 × 3 × 11 = 66
2 × 37 = 74
34 = 81
2 × 32 × 5 = 90
32 × 11 = 99
22 × 33 = 108
2 × 5 × 11 = 110
3 × 37 = 111
22 × 3 × 11 = 132
33 × 5 = 135
22 × 37 = 148
2 × 34 = 162
3 × 5 × 11 = 165
22 × 32 × 5 = 180
5 × 37 = 185
2 × 32 × 11 = 198
22 × 5 × 11 = 220
2 × 3 × 37 = 222
35 = 243
2 × 33 × 5 = 270
33 × 11 = 297
22 × 34 = 324
2 × 3 × 5 × 11 = 330
32 × 37 = 333
2 × 5 × 37 = 370
22 × 32 × 11 = 396
34 × 5 = 405
11 × 37 = 407
22 × 3 × 37 = 444
2 × 35 = 486
32 × 5 × 11 = 495
22 × 33 × 5 = 540
3 × 5 × 37 = 555
2 × 33 × 11 = 594
22 × 3 × 5 × 11 = 660
2 × 32 × 37 = 666
22 × 5 × 37 = 740
2 × 34 × 5 = 810
2 × 11 × 37 = 814
34 × 11 = 891
22 × 35 = 972
2 × 32 × 5 × 11 = 990
33 × 37 = 999
2 × 3 × 5 × 37 = 1,110
22 × 33 × 11 = 1,188
35 × 5 = 1,215
3 × 11 × 37 = 1,221
22 × 32 × 37 = 1,332
This list continues below...

... This list continues from above
33 × 5 × 11 = 1,485
22 × 34 × 5 = 1,620
22 × 11 × 37 = 1,628
32 × 5 × 37 = 1,665
2 × 34 × 11 = 1,782
22 × 32 × 5 × 11 = 1,980
2 × 33 × 37 = 1,998
5 × 11 × 37 = 2,035
22 × 3 × 5 × 37 = 2,220
2 × 35 × 5 = 2,430
2 × 3 × 11 × 37 = 2,442
35 × 11 = 2,673
2 × 33 × 5 × 11 = 2,970
34 × 37 = 2,997
2 × 32 × 5 × 37 = 3,330
22 × 34 × 11 = 3,564
32 × 11 × 37 = 3,663
22 × 33 × 37 = 3,996
2 × 5 × 11 × 37 = 4,070
34 × 5 × 11 = 4,455
22 × 35 × 5 = 4,860
22 × 3 × 11 × 37 = 4,884
33 × 5 × 37 = 4,995
2 × 35 × 11 = 5,346
22 × 33 × 5 × 11 = 5,940
2 × 34 × 37 = 5,994
3 × 5 × 11 × 37 = 6,105
22 × 32 × 5 × 37 = 6,660
2 × 32 × 11 × 37 = 7,326
22 × 5 × 11 × 37 = 8,140
2 × 34 × 5 × 11 = 8,910
35 × 37 = 8,991
2 × 33 × 5 × 37 = 9,990
22 × 35 × 11 = 10,692
33 × 11 × 37 = 10,989
22 × 34 × 37 = 11,988
2 × 3 × 5 × 11 × 37 = 12,210
35 × 5 × 11 = 13,365
22 × 32 × 11 × 37 = 14,652
34 × 5 × 37 = 14,985
22 × 34 × 5 × 11 = 17,820
2 × 35 × 37 = 17,982
32 × 5 × 11 × 37 = 18,315
22 × 33 × 5 × 37 = 19,980
2 × 33 × 11 × 37 = 21,978
22 × 3 × 5 × 11 × 37 = 24,420
2 × 35 × 5 × 11 = 26,730
2 × 34 × 5 × 37 = 29,970
34 × 11 × 37 = 32,967
22 × 35 × 37 = 35,964
2 × 32 × 5 × 11 × 37 = 36,630
22 × 33 × 11 × 37 = 43,956
35 × 5 × 37 = 44,955
22 × 35 × 5 × 11 = 53,460
33 × 5 × 11 × 37 = 54,945
22 × 34 × 5 × 37 = 59,940
2 × 34 × 11 × 37 = 65,934
22 × 32 × 5 × 11 × 37 = 73,260
2 × 35 × 5 × 37 = 89,910
35 × 11 × 37 = 98,901
2 × 33 × 5 × 11 × 37 = 109,890
22 × 34 × 11 × 37 = 131,868
34 × 5 × 11 × 37 = 164,835
22 × 35 × 5 × 37 = 179,820
2 × 35 × 11 × 37 = 197,802
22 × 33 × 5 × 11 × 37 = 219,780
2 × 34 × 5 × 11 × 37 = 329,670
22 × 35 × 11 × 37 = 395,604
35 × 5 × 11 × 37 = 494,505
22 × 34 × 5 × 11 × 37 = 659,340
2 × 35 × 5 × 11 × 37 = 989,010
22 × 35 × 5 × 11 × 37 = 1,978,020

The final answer:
(scroll down)

1,978,020 has 144 factors (divisors):
1; 2; 3; 4; 5; 6; 9; 10; 11; 12; 15; 18; 20; 22; 27; 30; 33; 36; 37; 44; 45; 54; 55; 60; 66; 74; 81; 90; 99; 108; 110; 111; 132; 135; 148; 162; 165; 180; 185; 198; 220; 222; 243; 270; 297; 324; 330; 333; 370; 396; 405; 407; 444; 486; 495; 540; 555; 594; 660; 666; 740; 810; 814; 891; 972; 990; 999; 1,110; 1,188; 1,215; 1,221; 1,332; 1,485; 1,620; 1,628; 1,665; 1,782; 1,980; 1,998; 2,035; 2,220; 2,430; 2,442; 2,673; 2,970; 2,997; 3,330; 3,564; 3,663; 3,996; 4,070; 4,455; 4,860; 4,884; 4,995; 5,346; 5,940; 5,994; 6,105; 6,660; 7,326; 8,140; 8,910; 8,991; 9,990; 10,692; 10,989; 11,988; 12,210; 13,365; 14,652; 14,985; 17,820; 17,982; 18,315; 19,980; 21,978; 24,420; 26,730; 29,970; 32,967; 35,964; 36,630; 43,956; 44,955; 53,460; 54,945; 59,940; 65,934; 73,260; 89,910; 98,901; 109,890; 131,868; 164,835; 179,820; 197,802; 219,780; 329,670; 395,604; 494,505; 659,340; 989,010 and 1,978,020
out of which 5 prime factors: 2; 3; 5; 11 and 37
1,978,020 and 1 are sometimes called improper factors, the others are called proper factors (proper divisors).

A quick way to find the factors (the divisors) of a number is to break it down into prime factors.

Then multiply the prime factors and their exponents, if any, in all their different combinations.


Other similar operations of calculating common factors:

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Factors (divisors), common factors (common divisors), the greatest common factor, GCF (also called the greatest common divisor, GCD, or the highest common factor, HCF)

  • If the number "t" is a factor (divisor) of the number "a" then in the prime factorization of "t" we will only encounter prime factors that also occur in the prime factorization of "a".
  • If there are exponents involved, the maximum value of an exponent for any base of a power that is found in the prime factorization of "t" (powers, or multiplicities) is at most equal to the exponent of the same base that is involved in the prime factorization of "a".
  • Hint: 23 = 2 × 2 × 2 = 8. 2 is called the base and 3 is the exponent. 23 is the power and 8 is the value of the power. We sometimes say that the number 2 is raised to the power of 3.
  • For example, 12 is a factor (divisor) of 120 - the remainder is zero when dividing 120 by 12.
  • Let's look at the prime factorization of both numbers and notice the bases and the exponents that occur in the prime factorization of both numbers:
  • 12 = 2 × 2 × 3 = 22 × 3
  • 120 = 2 × 2 × 2 × 3 × 5 = 23 × 3 × 5
  • 120 contains all the prime factors of 12, and all its bases' exponents are higher than those of 12.
  • If "t" is a common factor (divisor) of "a" and "b", then the prime factorization of "t" contains only the common prime factors involved in the prime factorizations of both "a" and "b".
  • If there are exponents involved, the maximum value of an exponent for any base of a power that is found in the prime factorization of "t" is at most equal to the minimum of the exponents of the same base that is involved in the prime factorization of both "a" and "b".
  • For example, 12 is the common factor of 48 and 360.
  • The remainder is zero when dividing either 48 or 360 by 12.
  • Here there are the prime factorizations of the three numbers, 12, 48 and 360:
  • 12 = 22 × 3
  • 48 = 24 × 3
  • 360 = 23 × 32 × 5
  • Please note that 48 and 360 have more factors (divisors): 2, 3, 4, 6, 8, 12, 24. Among them, 24 is the greatest common factor, GCF (or the greatest common divisor, GCD, or the highest common factor, HCF) of 48 and 360.
  • The greatest common factor, GCF, of two numbers, "a" and "b", is the product of all the common prime factors involved in the prime factorizations of both "a" and "b", taken by the lowest exponents.
  • Based on this rule it is calculated the greatest common factor, GCF, (or the greatest common divisor GCD, HCF) of several numbers, as shown in the example below...
  • GCF, GCD (1,260; 3,024; 5,544) = ?
  • 1,260 = 22 × 32
  • 3,024 = 24 × 32 × 7
  • 5,544 = 23 × 32 × 7 × 11
  • The common prime factors are:
  • 2 - its lowest exponent (multiplicity) is: min.(2; 3; 4) = 2
  • 3 - its lowest exponent (multiplicity) is: min.(2; 2; 2) = 2
  • GCF, GCD (1,260; 3,024; 5,544) = 22 × 32 = 252
  • Coprime numbers:
  • If two numbers "a" and "b" have no other common factors (divisors) than 1, gfc, gcd, hcf (a; b) = 1, then the numbers "a" and "b" are called coprime (or relatively prime).
  • Factors of the GCF
  • If "a" and "b" are not coprime, then every common factor (divisor) of "a" and "b" is a also a factor (divisor) of the greatest common factor, GCF (greatest common divisor, GCD, highest common factor, HCF) of "a" and "b".