What is the Greatest Common Factor of 21108 and 21115?

Greatest common factor (GCF) of 21108 and 21115 is 1.

GCF(21108,21115) = 1

We will now calculate the prime factors of 21108 and 21115, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21108 and 21115.

How to find the GCF of 21108 and 21115?

We will first find the prime factorization of 21108 and 21115. After we will calculate the factors of 21108 and 21115 and find the biggest common factor number .

Step-1: Prime Factorization of 21108

Prime factors of 21108 are 2, 3, 1759. Prime factorization of 21108 in exponential form is:

21108 = 2² × 3¹ × 1759¹

Step-2: Prime Factorization of 21115

Prime factors of 21115 are 5, 41, 103. Prime factorization of 21115 in exponential form is:

21115 = 5¹ × 41¹ × 103¹

Step-3: Factors of 21108

List of positive integer factors of 21108 that divides 21108 without a remainder.

1, 2, 3, 4, 6, 12, 1759, 3518, 5277, 7036, 10554

Step-4: Factors of 21115

List of positive integer factors of 21115 that divides 21108 without a remainder.

1, 5, 41, 103, 205, 515, 4223

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21108 and 21115. The biggest common factor number is the GCF number.
So the greatest common factor 21108 and 21115 is 1.

Also check out the Least Common Multiple of 21108 and 21115