What is the Greatest Common Factor of 72920 and 72940?

Greatest common factor (GCF) of 72920 and 72940 is 20.

GCF(72920,72940) = 20

We will now calculate the prime factors of 72920 and 72940, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 72920 and 72940.

How to find the GCF of 72920 and 72940?

We will first find the prime factorization of 72920 and 72940. After we will calculate the factors of 72920 and 72940 and find the biggest common factor number .

Step-1: Prime Factorization of 72920

Prime factors of 72920 are 2, 5, 1823. Prime factorization of 72920 in exponential form is:

72920 = 2³ × 5¹ × 1823¹

Step-2: Prime Factorization of 72940

Prime factors of 72940 are 2, 5, 7, 521. Prime factorization of 72940 in exponential form is:

72940 = 2² × 5¹ × 7¹ × 521¹

Step-3: Factors of 72920

List of positive integer factors of 72920 that divides 72920 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 1823, 3646, 7292, 9115, 14584, 18230, 36460

Step-4: Factors of 72940

List of positive integer factors of 72940 that divides 72920 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 521, 1042, 2084, 2605, 3647, 5210, 7294, 10420, 14588, 18235, 36470

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 72920 and 72940. The biggest common factor number is the GCF number.
So the greatest common factor 72920 and 72940 is 20.

Also check out the Least Common Multiple of 72920 and 72940