What is the Greatest Common Factor of 21710 and 21715?

Greatest common factor (GCF) of 21710 and 21715 is 5.

GCF(21710,21715) = 5

We will now calculate the prime factors of 21710 and 21715, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21710 and 21715.

How to find the GCF of 21710 and 21715?

We will first find the prime factorization of 21710 and 21715. After we will calculate the factors of 21710 and 21715 and find the biggest common factor number .

Step-1: Prime Factorization of 21710

Prime factors of 21710 are 2, 5, 13, 167. Prime factorization of 21710 in exponential form is:

21710 = 2¹ × 5¹ × 13¹ × 167¹

Step-2: Prime Factorization of 21715

Prime factors of 21715 are 5, 43, 101. Prime factorization of 21715 in exponential form is:

21715 = 5¹ × 43¹ × 101¹

Step-3: Factors of 21710

List of positive integer factors of 21710 that divides 21710 without a remainder.

1, 2, 5, 10, 13, 26, 65, 130, 167, 334, 835, 1670, 2171, 4342, 10855

Step-4: Factors of 21715

List of positive integer factors of 21715 that divides 21710 without a remainder.

1, 5, 43, 101, 215, 505, 4343

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21710 and 21715. The biggest common factor number is the GCF number.
So the greatest common factor 21710 and 21715 is 5.

Also check out the Least Common Multiple of 21710 and 21715