What is the Greatest Common Factor of 21135 and 21145?

Greatest common factor (GCF) of 21135 and 21145 is 5.

GCF(21135,21145) = 5

We will now calculate the prime factors of 21135 and 21145, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21135 and 21145.

How to find the GCF of 21135 and 21145?

We will first find the prime factorization of 21135 and 21145. After we will calculate the factors of 21135 and 21145 and find the biggest common factor number .

Step-1: Prime Factorization of 21135

Prime factors of 21135 are 3, 5, 1409. Prime factorization of 21135 in exponential form is:

21135 = 3¹ × 5¹ × 1409¹

Step-2: Prime Factorization of 21145

Prime factors of 21145 are 5, 4229. Prime factorization of 21145 in exponential form is:

21145 = 5¹ × 4229¹

Step-3: Factors of 21135

List of positive integer factors of 21135 that divides 21135 without a remainder.

1, 3, 5, 15, 1409, 4227, 7045

Step-4: Factors of 21145

List of positive integer factors of 21145 that divides 21135 without a remainder.

1, 5, 4229

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21135 and 21145. The biggest common factor number is the GCF number.
So the greatest common factor 21135 and 21145 is 5.

Also check out the Least Common Multiple of 21135 and 21145