What is the Greatest Common Factor of 81724 and 81728?

Greatest common factor (GCF) of 81724 and 81728 is 4.

GCF(81724,81728) = 4

We will now calculate the prime factors of 81724 and 81728, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81724 and 81728.

How to find the GCF of 81724 and 81728?

We will first find the prime factorization of 81724 and 81728. After we will calculate the factors of 81724 and 81728 and find the biggest common factor number .

Step-1: Prime Factorization of 81724

Prime factors of 81724 are 2, 20431. Prime factorization of 81724 in exponential form is:

81724 = 2² × 20431¹

Step-2: Prime Factorization of 81728

Prime factors of 81728 are 2, 1277. Prime factorization of 81728 in exponential form is:

81728 = 2⁶ × 1277¹

Step-3: Factors of 81724

List of positive integer factors of 81724 that divides 81724 without a remainder.

1, 2, 4, 20431, 40862

Step-4: Factors of 81728

List of positive integer factors of 81728 that divides 81724 without a remainder.

1, 2, 4, 8, 16, 32, 64, 1277, 2554, 5108, 10216, 20432, 40864

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81724 and 81728. The biggest common factor number is the GCF number.
So the greatest common factor 81724 and 81728 is 4.

Also check out the Least Common Multiple of 81724 and 81728