What is the Greatest Common Factor of 21021 and 21036?

Greatest common factor (GCF) of 21021 and 21036 is 3.

GCF(21021,21036) = 3

We will now calculate the prime factors of 21021 and 21036, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21021 and 21036.

How to find the GCF of 21021 and 21036?

We will first find the prime factorization of 21021 and 21036. After we will calculate the factors of 21021 and 21036 and find the biggest common factor number .

Step-1: Prime Factorization of 21021

Prime factors of 21021 are 3, 7, 11, 13. Prime factorization of 21021 in exponential form is:

21021 = 3¹ × 7² × 11¹ × 13¹

Step-2: Prime Factorization of 21036

Prime factors of 21036 are 2, 3, 1753. Prime factorization of 21036 in exponential form is:

21036 = 2² × 3¹ × 1753¹

Step-3: Factors of 21021

List of positive integer factors of 21021 that divides 21021 without a remainder.

1, 3, 7, 11, 13, 21, 33, 39, 49, 77, 91, 143, 147, 231, 273, 429, 539, 637, 1001, 1617, 1911, 3003, 7007

Step-4: Factors of 21036

List of positive integer factors of 21036 that divides 21021 without a remainder.

1, 2, 3, 4, 6, 12, 1753, 3506, 5259, 7012, 10518

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21021 and 21036. The biggest common factor number is the GCF number.
So the greatest common factor 21021 and 21036 is 3.

Also check out the Least Common Multiple of 21021 and 21036