What is the Greatest Common Factor of 39615 and 39621?

Greatest common factor (GCF) of 39615 and 39621 is 3.

GCF(39615,39621) = 3

We will now calculate the prime factors of 39615 and 39621, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39615 and 39621.

How to find the GCF of 39615 and 39621?

We will first find the prime factorization of 39615 and 39621. After we will calculate the factors of 39615 and 39621 and find the biggest common factor number .

Step-1: Prime Factorization of 39615

Prime factors of 39615 are 3, 5, 19, 139. Prime factorization of 39615 in exponential form is:

39615 = 3¹ × 5¹ × 19¹ × 139¹

Step-2: Prime Factorization of 39621

Prime factors of 39621 are 3, 47, 281. Prime factorization of 39621 in exponential form is:

39621 = 3¹ × 47¹ × 281¹

Step-3: Factors of 39615

List of positive integer factors of 39615 that divides 39615 without a remainder.

1, 3, 5, 15, 19, 57, 95, 139, 285, 417, 695, 2085, 2641, 7923, 13205

Step-4: Factors of 39621

List of positive integer factors of 39621 that divides 39615 without a remainder.

1, 3, 47, 141, 281, 843, 13207

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39615 and 39621. The biggest common factor number is the GCF number.
So the greatest common factor 39615 and 39621 is 3.

Also check out the Least Common Multiple of 39615 and 39621