What is the Greatest Common Factor of 20711 and 20721?

Greatest common factor (GCF) of 20711 and 20721 is 1.

GCF(20711,20721) = 1

We will now calculate the prime factors of 20711 and 20721, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20711 and 20721.

How to find the GCF of 20711 and 20721?

We will first find the prime factorization of 20711 and 20721. After we will calculate the factors of 20711 and 20721 and find the biggest common factor number .

Step-1: Prime Factorization of 20711

Prime factors of 20711 are 139, 149. Prime factorization of 20711 in exponential form is:

20711 = 139¹ × 149¹

Step-2: Prime Factorization of 20721

Prime factors of 20721 are 3, 6907. Prime factorization of 20721 in exponential form is:

20721 = 3¹ × 6907¹

Step-3: Factors of 20711

List of positive integer factors of 20711 that divides 20711 without a remainder.

1, 139, 149

Step-4: Factors of 20721

List of positive integer factors of 20721 that divides 20711 without a remainder.

1, 3, 6907

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20711 and 20721. The biggest common factor number is the GCF number.
So the greatest common factor 20711 and 20721 is 1.

Also check out the Least Common Multiple of 20711 and 20721