What is the Greatest Common Factor of 21465 and 21477?

Greatest common factor (GCF) of 21465 and 21477 is 3.

GCF(21465,21477) = 3

We will now calculate the prime factors of 21465 and 21477, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21465 and 21477.

How to find the GCF of 21465 and 21477?

We will first find the prime factorization of 21465 and 21477. After we will calculate the factors of 21465 and 21477 and find the biggest common factor number .

Step-1: Prime Factorization of 21465

Prime factors of 21465 are 3, 5, 53. Prime factorization of 21465 in exponential form is:

21465 = 3⁴ × 5¹ × 53¹

Step-2: Prime Factorization of 21477

Prime factors of 21477 are 3, 7159. Prime factorization of 21477 in exponential form is:

21477 = 3¹ × 7159¹

Step-3: Factors of 21465

List of positive integer factors of 21465 that divides 21465 without a remainder.

1, 3, 5, 9, 15, 27, 45, 53, 81, 135, 159, 265, 405, 477, 795, 1431, 2385, 4293, 7155

Step-4: Factors of 21477

List of positive integer factors of 21477 that divides 21465 without a remainder.

1, 3, 7159

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21465 and 21477. The biggest common factor number is the GCF number.
So the greatest common factor 21465 and 21477 is 3.

Also check out the Least Common Multiple of 21465 and 21477