What is the Greatest Common Factor of 19715 and 19721?

Greatest common factor (GCF) of 19715 and 19721 is 1.

GCF(19715,19721) = 1

We will now calculate the prime factors of 19715 and 19721, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19715 and 19721.

How to find the GCF of 19715 and 19721?

We will first find the prime factorization of 19715 and 19721. After we will calculate the factors of 19715 and 19721 and find the biggest common factor number .

Step-1: Prime Factorization of 19715

Prime factors of 19715 are 5, 3943. Prime factorization of 19715 in exponential form is:

19715 = 5¹ × 3943¹

Step-2: Prime Factorization of 19721

Prime factors of 19721 are 13, 37, 41. Prime factorization of 19721 in exponential form is:

19721 = 13¹ × 37¹ × 41¹

Step-3: Factors of 19715

List of positive integer factors of 19715 that divides 19715 without a remainder.

1, 5, 3943

Step-4: Factors of 19721

List of positive integer factors of 19721 that divides 19715 without a remainder.

1, 13, 37, 41, 481, 533, 1517

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19715 and 19721. The biggest common factor number is the GCF number.
So the greatest common factor 19715 and 19721 is 1.

Also check out the Least Common Multiple of 19715 and 19721