What is the Greatest Common Factor of 91605 and 91620?

Greatest common factor (GCF) of 91605 and 91620 is 15.

GCF(91605,91620) = 15

We will now calculate the prime factors of 91605 and 91620, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91605 and 91620.

How to find the GCF of 91605 and 91620?

We will first find the prime factorization of 91605 and 91620. After we will calculate the factors of 91605 and 91620 and find the biggest common factor number .

Step-1: Prime Factorization of 91605

Prime factors of 91605 are 3, 5, 31, 197. Prime factorization of 91605 in exponential form is:

91605 = 3¹ × 5¹ × 31¹ × 197¹

Step-2: Prime Factorization of 91620

Prime factors of 91620 are 2, 3, 5, 509. Prime factorization of 91620 in exponential form is:

91620 = 2² × 3² × 5¹ × 509¹

Step-3: Factors of 91605

List of positive integer factors of 91605 that divides 91605 without a remainder.

1, 3, 5, 15, 31, 93, 155, 197, 465, 591, 985, 2955, 6107, 18321, 30535

Step-4: Factors of 91620

List of positive integer factors of 91620 that divides 91605 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 509, 1018, 1527, 2036, 2545, 3054, 4581, 5090, 6108, 7635, 9162, 10180, 15270, 18324, 22905, 30540, 45810

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91605 and 91620. The biggest common factor number is the GCF number.
So the greatest common factor 91605 and 91620 is 15.

Also check out the Least Common Multiple of 91605 and 91620