What is the Greatest Common Factor of 21971 and 21986?

Greatest common factor (GCF) of 21971 and 21986 is 1.

GCF(21971,21986) = 1

We will now calculate the prime factors of 21971 and 21986, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21971 and 21986.

How to find the GCF of 21971 and 21986?

We will first find the prime factorization of 21971 and 21986. After we will calculate the factors of 21971 and 21986 and find the biggest common factor number .

Step-1: Prime Factorization of 21971

Prime factors of 21971 are 127, 173. Prime factorization of 21971 in exponential form is:

21971 = 127¹ × 173¹

Step-2: Prime Factorization of 21986

Prime factors of 21986 are 2, 10993. Prime factorization of 21986 in exponential form is:

21986 = 2¹ × 10993¹

Step-3: Factors of 21971

List of positive integer factors of 21971 that divides 21971 without a remainder.

1, 127, 173

Step-4: Factors of 21986

List of positive integer factors of 21986 that divides 21971 without a remainder.

1, 2, 10993

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21971 and 21986. The biggest common factor number is the GCF number.
So the greatest common factor 21971 and 21986 is 1.

Also check out the Least Common Multiple of 21971 and 21986