What is the Greatest Common Factor of 21328 and 21336?

Greatest common factor (GCF) of 21328 and 21336 is 8.

GCF(21328,21336) = 8

We will now calculate the prime factors of 21328 and 21336, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21328 and 21336.

How to find the GCF of 21328 and 21336?

We will first find the prime factorization of 21328 and 21336. After we will calculate the factors of 21328 and 21336 and find the biggest common factor number .

Step-1: Prime Factorization of 21328

Prime factors of 21328 are 2, 31, 43. Prime factorization of 21328 in exponential form is:

21328 = 2⁴ × 31¹ × 43¹

Step-2: Prime Factorization of 21336

Prime factors of 21336 are 2, 3, 7, 127. Prime factorization of 21336 in exponential form is:

21336 = 2³ × 3¹ × 7¹ × 127¹

Step-3: Factors of 21328

List of positive integer factors of 21328 that divides 21328 without a remainder.

1, 2, 4, 8, 16, 31, 43, 62, 86, 124, 172, 248, 344, 496, 688, 1333, 2666, 5332, 10664

Step-4: Factors of 21336

List of positive integer factors of 21336 that divides 21328 without a remainder.

1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 127, 168, 254, 381, 508, 762, 889, 1016, 1524, 1778, 2667, 3048, 3556, 5334, 7112, 10668

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21328 and 21336. The biggest common factor number is the GCF number.
So the greatest common factor 21328 and 21336 is 8.

Also check out the Least Common Multiple of 21328 and 21336