What is the Greatest Common Factor of 21595 and 21615?

Greatest common factor (GCF) of 21595 and 21615 is 5.

GCF(21595,21615) = 5

We will now calculate the prime factors of 21595 and 21615, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21595 and 21615.

How to find the GCF of 21595 and 21615?

We will first find the prime factorization of 21595 and 21615. After we will calculate the factors of 21595 and 21615 and find the biggest common factor number .

Step-1: Prime Factorization of 21595

Prime factors of 21595 are 5, 7, 617. Prime factorization of 21595 in exponential form is:

21595 = 5¹ × 7¹ × 617¹

Step-2: Prime Factorization of 21615

Prime factors of 21615 are 3, 5, 11, 131. Prime factorization of 21615 in exponential form is:

21615 = 3¹ × 5¹ × 11¹ × 131¹

Step-3: Factors of 21595

List of positive integer factors of 21595 that divides 21595 without a remainder.

1, 5, 7, 35, 617, 3085, 4319

Step-4: Factors of 21615

List of positive integer factors of 21615 that divides 21595 without a remainder.

1, 3, 5, 11, 15, 33, 55, 131, 165, 393, 655, 1441, 1965, 4323, 7205

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21595 and 21615. The biggest common factor number is the GCF number.
So the greatest common factor 21595 and 21615 is 5.

Also check out the Least Common Multiple of 21595 and 21615