What is the Greatest Common Factor of 21287 and 21299?

Greatest common factor (GCF) of 21287 and 21299 is 1.

GCF(21287,21299) = 1

We will now calculate the prime factors of 21287 and 21299, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21287 and 21299.

How to find the GCF of 21287 and 21299?

We will first find the prime factorization of 21287 and 21299. After we will calculate the factors of 21287 and 21299 and find the biggest common factor number .

Step-1: Prime Factorization of 21287

Prime factors of 21287 are 7, 3041. Prime factorization of 21287 in exponential form is:

21287 = 7¹ × 3041¹

Step-2: Prime Factorization of 21299

Prime factors of 21299 are 19, 59. Prime factorization of 21299 in exponential form is:

21299 = 19² × 59¹

Step-3: Factors of 21287

List of positive integer factors of 21287 that divides 21287 without a remainder.

1, 7, 3041

Step-4: Factors of 21299

List of positive integer factors of 21299 that divides 21287 without a remainder.

1, 19, 59, 361, 1121

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21287 and 21299. The biggest common factor number is the GCF number.
So the greatest common factor 21287 and 21299 is 1.

Also check out the Least Common Multiple of 21287 and 21299