What is the Greatest Common Factor of 21387 and 21407?

Greatest common factor (GCF) of 21387 and 21407 is 1.

GCF(21387,21407) = 1

We will now calculate the prime factors of 21387 and 21407, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21387 and 21407.

How to find the GCF of 21387 and 21407?

We will first find the prime factorization of 21387 and 21407. After we will calculate the factors of 21387 and 21407 and find the biggest common factor number .

Step-1: Prime Factorization of 21387

Prime factors of 21387 are 3, 7129. Prime factorization of 21387 in exponential form is:

21387 = 3¹ × 7129¹

Step-2: Prime Factorization of 21407

Prime factors of 21407 are 21407. Prime factorization of 21407 in exponential form is:

21407 = 21407¹

Step-3: Factors of 21387

List of positive integer factors of 21387 that divides 21387 without a remainder.

1, 3, 7129

Step-4: Factors of 21407

List of positive integer factors of 21407 that divides 21387 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21387 and 21407. The biggest common factor number is the GCF number.
So the greatest common factor 21387 and 21407 is 1.

Also check out the Least Common Multiple of 21387 and 21407