What is the Greatest Common Factor of 21328 and 21332?

Greatest common factor (GCF) of 21328 and 21332 is 4.

GCF(21328,21332) = 4

We will now calculate the prime factors of 21328 and 21332, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21328 and 21332.

How to find the GCF of 21328 and 21332?

We will first find the prime factorization of 21328 and 21332. After we will calculate the factors of 21328 and 21332 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 21332

Prime factors of 21332 are 2, 5333. Prime factorization of 21332 in exponential form is:

21332 = 2² × 5333¹

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 21332

List of positive integer factors of 21332 that divides 21328 without a remainder.

1, 2, 4, 5333, 10666

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21328 and 21332. The biggest common factor number is the GCF number.
So the greatest common factor 21328 and 21332 is 4.

Also check out the Least Common Multiple of 21328 and 21332