What is the Greatest Common Factor of 21152 and 21156?

Greatest common factor (GCF) of 21152 and 21156 is 4.

GCF(21152,21156) = 4

We will now calculate the prime factors of 21152 and 21156, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21152 and 21156.

How to find the GCF of 21152 and 21156?

We will first find the prime factorization of 21152 and 21156. After we will calculate the factors of 21152 and 21156 and find the biggest common factor number .

Step-1: Prime Factorization of 21152

Prime factors of 21152 are 2, 661. Prime factorization of 21152 in exponential form is:

21152 = 2⁵ × 661¹

Step-2: Prime Factorization of 21156

Prime factors of 21156 are 2, 3, 41, 43. Prime factorization of 21156 in exponential form is:

21156 = 2² × 3¹ × 41¹ × 43¹

Step-3: Factors of 21152

List of positive integer factors of 21152 that divides 21152 without a remainder.

1, 2, 4, 8, 16, 32, 661, 1322, 2644, 5288, 10576

Step-4: Factors of 21156

List of positive integer factors of 21156 that divides 21152 without a remainder.

1, 2, 3, 4, 6, 12, 41, 43, 82, 86, 123, 129, 164, 172, 246, 258, 492, 516, 1763, 3526, 5289, 7052, 10578

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21152 and 21156. The biggest common factor number is the GCF number.
So the greatest common factor 21152 and 21156 is 4.

Also check out the Least Common Multiple of 21152 and 21156