What is the Greatest Common Factor of 21459 and 21468?

Greatest common factor (GCF) of 21459 and 21468 is 3.

GCF(21459,21468) = 3

We will now calculate the prime factors of 21459 and 21468, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21459 and 21468.

How to find the GCF of 21459 and 21468?

We will first find the prime factorization of 21459 and 21468. After we will calculate the factors of 21459 and 21468 and find the biggest common factor number .

Step-1: Prime Factorization of 21459

Prime factors of 21459 are 3, 23, 311. Prime factorization of 21459 in exponential form is:

21459 = 3¹ × 23¹ × 311¹

Step-2: Prime Factorization of 21468

Prime factors of 21468 are 2, 3, 1789. Prime factorization of 21468 in exponential form is:

21468 = 2² × 3¹ × 1789¹

Step-3: Factors of 21459

List of positive integer factors of 21459 that divides 21459 without a remainder.

1, 3, 23, 69, 311, 933, 7153

Step-4: Factors of 21468

List of positive integer factors of 21468 that divides 21459 without a remainder.

1, 2, 3, 4, 6, 12, 1789, 3578, 5367, 7156, 10734

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21459 and 21468. The biggest common factor number is the GCF number.
So the greatest common factor 21459 and 21468 is 3.

Also check out the Least Common Multiple of 21459 and 21468