What is the Greatest Common Factor of 91215 and 91221?

Greatest common factor (GCF) of 91215 and 91221 is 3.

GCF(91215,91221) = 3

We will now calculate the prime factors of 91215 and 91221, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91215 and 91221.

How to find the GCF of 91215 and 91221?

We will first find the prime factorization of 91215 and 91221. After we will calculate the factors of 91215 and 91221 and find the biggest common factor number .

Step-1: Prime Factorization of 91215

Prime factors of 91215 are 3, 5, 2027. Prime factorization of 91215 in exponential form is:

91215 = 3² × 5¹ × 2027¹

Step-2: Prime Factorization of 91221

Prime factors of 91221 are 3, 13, 2339. Prime factorization of 91221 in exponential form is:

91221 = 3¹ × 13¹ × 2339¹

Step-3: Factors of 91215

List of positive integer factors of 91215 that divides 91215 without a remainder.

1, 3, 5, 9, 15, 45, 2027, 6081, 10135, 18243, 30405

Step-4: Factors of 91221

List of positive integer factors of 91221 that divides 91215 without a remainder.

1, 3, 13, 39, 2339, 7017, 30407

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91215 and 91221. The biggest common factor number is the GCF number.
So the greatest common factor 91215 and 91221 is 3.

Also check out the Least Common Multiple of 91215 and 91221