What is the Greatest Common Factor of 72640 and 72660?

Greatest common factor (GCF) of 72640 and 72660 is 20.

GCF(72640,72660) = 20

We will now calculate the prime factors of 72640 and 72660, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72640 and 72660.

How to find the GCF of 72640 and 72660?

We will first find the prime factorization of 72640 and 72660. After we will calculate the factors of 72640 and 72660 and find the biggest common factor number .

Step-1: Prime Factorization of 72640

Prime factors of 72640 are 2, 5, 227. Prime factorization of 72640 in exponential form is:

72640 = 2⁶ × 5¹ × 227¹

Step-2: Prime Factorization of 72660

Prime factors of 72660 are 2, 3, 5, 7, 173. Prime factorization of 72660 in exponential form is:

72660 = 2² × 3¹ × 5¹ × 7¹ × 173¹

Step-3: Factors of 72640

List of positive integer factors of 72640 that divides 72640 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 227, 320, 454, 908, 1135, 1816, 2270, 3632, 4540, 7264, 9080, 14528, 18160, 36320

Step-4: Factors of 72660

List of positive integer factors of 72660 that divides 72640 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 173, 210, 346, 420, 519, 692, 865, 1038, 1211, 1730, 2076, 2422, 2595, 3460, 3633, 4844, 5190, 6055, 7266, 10380, 12110, 14532, 18165, 24220, 36330

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72640 and 72660. The biggest common factor number is the GCF number.
So the greatest common factor 72640 and 72660 is 20.

Also check out the Least Common Multiple of 72640 and 72660