What is the Greatest Common Factor of 25515 and 25521?

Greatest common factor (GCF) of 25515 and 25521 is 3.

GCF(25515,25521) = 3

We will now calculate the prime factors of 25515 and 25521, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25515 and 25521.

How to find the GCF of 25515 and 25521?

We will first find the prime factorization of 25515 and 25521. After we will calculate the factors of 25515 and 25521 and find the biggest common factor number .

Step-1: Prime Factorization of 25515

Prime factors of 25515 are 3, 5, 7. Prime factorization of 25515 in exponential form is:

25515 = 3⁶ × 5¹ × 7¹

Step-2: Prime Factorization of 25521

Prime factors of 25521 are 3, 47, 181. Prime factorization of 25521 in exponential form is:

25521 = 3¹ × 47¹ × 181¹

Step-3: Factors of 25515

List of positive integer factors of 25515 that divides 25515 without a remainder.

1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 243, 315, 405, 567, 729, 945, 1215, 1701, 2835, 3645, 5103, 8505

Step-4: Factors of 25521

List of positive integer factors of 25521 that divides 25515 without a remainder.

1, 3, 47, 141, 181, 543, 8507

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25515 and 25521. The biggest common factor number is the GCF number.
So the greatest common factor 25515 and 25521 is 3.

Also check out the Least Common Multiple of 25515 and 25521