What is the Greatest Common Factor of 91765 and 91780?

Greatest common factor (GCF) of 91765 and 91780 is 5.

GCF(91765,91780) = 5

We will now calculate the prime factors of 91765 and 91780, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91765 and 91780.

How to find the GCF of 91765 and 91780?

We will first find the prime factorization of 91765 and 91780. After we will calculate the factors of 91765 and 91780 and find the biggest common factor number .

Step-1: Prime Factorization of 91765

Prime factors of 91765 are 5, 18353. Prime factorization of 91765 in exponential form is:

91765 = 5¹ × 18353¹

Step-2: Prime Factorization of 91780

Prime factors of 91780 are 2, 5, 13, 353. Prime factorization of 91780 in exponential form is:

91780 = 2² × 5¹ × 13¹ × 353¹

Step-3: Factors of 91765

List of positive integer factors of 91765 that divides 91765 without a remainder.

1, 5, 18353

Step-4: Factors of 91780

List of positive integer factors of 91780 that divides 91765 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 353, 706, 1412, 1765, 3530, 4589, 7060, 9178, 18356, 22945, 45890

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91765 and 91780. The biggest common factor number is the GCF number.
So the greatest common factor 91765 and 91780 is 5.

Also check out the Least Common Multiple of 91765 and 91780