What is the Greatest Common Factor of 21355 and 21364?

Greatest common factor (GCF) of 21355 and 21364 is 1.

GCF(21355,21364) = 1

We will now calculate the prime factors of 21355 and 21364, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21355 and 21364.

How to find the GCF of 21355 and 21364?

We will first find the prime factorization of 21355 and 21364. After we will calculate the factors of 21355 and 21364 and find the biggest common factor number .

Step-1: Prime Factorization of 21355

Prime factors of 21355 are 5, 4271. Prime factorization of 21355 in exponential form is:

21355 = 5¹ × 4271¹

Step-2: Prime Factorization of 21364

Prime factors of 21364 are 2, 7, 109. Prime factorization of 21364 in exponential form is:

21364 = 2² × 7² × 109¹

Step-3: Factors of 21355

List of positive integer factors of 21355 that divides 21355 without a remainder.

1, 5, 4271

Step-4: Factors of 21364

List of positive integer factors of 21364 that divides 21355 without a remainder.

1, 2, 4, 7, 14, 28, 49, 98, 109, 196, 218, 436, 763, 1526, 3052, 5341, 10682

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21355 and 21364. The biggest common factor number is the GCF number.
So the greatest common factor 21355 and 21364 is 1.

Also check out the Least Common Multiple of 21355 and 21364