What is the Greatest Common Factor of 15621 and 15639?

Greatest common factor (GCF) of 15621 and 15639 is 3.

GCF(15621,15639) = 3

We will now calculate the prime factors of 15621 and 15639, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15621 and 15639.

How to find the GCF of 15621 and 15639?

We will first find the prime factorization of 15621 and 15639. After we will calculate the factors of 15621 and 15639 and find the biggest common factor number .

Step-1: Prime Factorization of 15621

Prime factors of 15621 are 3, 41, 127. Prime factorization of 15621 in exponential form is:

15621 = 3¹ × 41¹ × 127¹

Step-2: Prime Factorization of 15639

Prime factors of 15639 are 3, 13, 401. Prime factorization of 15639 in exponential form is:

15639 = 3¹ × 13¹ × 401¹

Step-3: Factors of 15621

List of positive integer factors of 15621 that divides 15621 without a remainder.

1, 3, 41, 123, 127, 381, 5207

Step-4: Factors of 15639

List of positive integer factors of 15639 that divides 15621 without a remainder.

1, 3, 13, 39, 401, 1203, 5213

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15621 and 15639. The biggest common factor number is the GCF number.
So the greatest common factor 15621 and 15639 is 3.

Also check out the Least Common Multiple of 15621 and 15639