What is the Greatest Common Factor of 21456 and 21476?

Greatest common factor (GCF) of 21456 and 21476 is 4.

GCF(21456,21476) = 4

We will now calculate the prime factors of 21456 and 21476, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21456 and 21476.

How to find the GCF of 21456 and 21476?

We will first find the prime factorization of 21456 and 21476. After we will calculate the factors of 21456 and 21476 and find the biggest common factor number .

Step-1: Prime Factorization of 21456

Prime factors of 21456 are 2, 3, 149. Prime factorization of 21456 in exponential form is:

21456 = 2⁴ × 3² × 149¹

Step-2: Prime Factorization of 21476

Prime factors of 21476 are 2, 7, 13, 59. Prime factorization of 21476 in exponential form is:

21476 = 2² × 7¹ × 13¹ × 59¹

Step-3: Factors of 21456

List of positive integer factors of 21456 that divides 21456 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 149, 298, 447, 596, 894, 1192, 1341, 1788, 2384, 2682, 3576, 5364, 7152, 10728

Step-4: Factors of 21476

List of positive integer factors of 21476 that divides 21456 without a remainder.

1, 2, 4, 7, 13, 14, 26, 28, 52, 59, 91, 118, 182, 236, 364, 413, 767, 826, 1534, 1652, 3068, 5369, 10738

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21456 and 21476. The biggest common factor number is the GCF number.
So the greatest common factor 21456 and 21476 is 4.

Also check out the Least Common Multiple of 21456 and 21476