What is the Greatest Common Factor of 91220 and 91240?

Greatest common factor (GCF) of 91220 and 91240 is 20.

GCF(91220,91240) = 20

We will now calculate the prime factors of 91220 and 91240, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91220 and 91240.

How to find the GCF of 91220 and 91240?

We will first find the prime factorization of 91220 and 91240. After we will calculate the factors of 91220 and 91240 and find the biggest common factor number .

Step-1: Prime Factorization of 91220

Prime factors of 91220 are 2, 5, 4561. Prime factorization of 91220 in exponential form is:

91220 = 2² × 5¹ × 4561¹

Step-2: Prime Factorization of 91240

Prime factors of 91240 are 2, 5, 2281. Prime factorization of 91240 in exponential form is:

91240 = 2³ × 5¹ × 2281¹

Step-3: Factors of 91220

List of positive integer factors of 91220 that divides 91220 without a remainder.

1, 2, 4, 5, 10, 20, 4561, 9122, 18244, 22805, 45610

Step-4: Factors of 91240

List of positive integer factors of 91240 that divides 91220 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 2281, 4562, 9124, 11405, 18248, 22810, 45620

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91220 and 91240. The biggest common factor number is the GCF number.
So the greatest common factor 91220 and 91240 is 20.

Also check out the Least Common Multiple of 91220 and 91240