What is the Greatest Common Factor of 39315 and 39321?

Greatest common factor (GCF) of 39315 and 39321 is 3.

GCF(39315,39321) = 3

We will now calculate the prime factors of 39315 and 39321, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39315 and 39321.

How to find the GCF of 39315 and 39321?

We will first find the prime factorization of 39315 and 39321. After we will calculate the factors of 39315 and 39321 and find the biggest common factor number .

Step-1: Prime Factorization of 39315

Prime factors of 39315 are 3, 5, 2621. Prime factorization of 39315 in exponential form is:

39315 = 3¹ × 5¹ × 2621¹

Step-2: Prime Factorization of 39321

Prime factors of 39321 are 3, 17, 257. Prime factorization of 39321 in exponential form is:

39321 = 3² × 17¹ × 257¹

Step-3: Factors of 39315

List of positive integer factors of 39315 that divides 39315 without a remainder.

1, 3, 5, 15, 2621, 7863, 13105

Step-4: Factors of 39321

List of positive integer factors of 39321 that divides 39315 without a remainder.

1, 3, 9, 17, 51, 153, 257, 771, 2313, 4369, 13107

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39315 and 39321. The biggest common factor number is the GCF number.
So the greatest common factor 39315 and 39321 is 3.

Also check out the Least Common Multiple of 39315 and 39321