What is the Greatest Common Factor of 21105 and 21124?

Greatest common factor (GCF) of 21105 and 21124 is 1.

GCF(21105,21124) = 1

We will now calculate the prime factors of 21105 and 21124, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21105 and 21124.

How to find the GCF of 21105 and 21124?

We will first find the prime factorization of 21105 and 21124. After we will calculate the factors of 21105 and 21124 and find the biggest common factor number .

Step-1: Prime Factorization of 21105

Prime factors of 21105 are 3, 5, 7, 67. Prime factorization of 21105 in exponential form is:

21105 = 3² × 5¹ × 7¹ × 67¹

Step-2: Prime Factorization of 21124

Prime factors of 21124 are 2, 5281. Prime factorization of 21124 in exponential form is:

21124 = 2² × 5281¹

Step-3: Factors of 21105

List of positive integer factors of 21105 that divides 21105 without a remainder.

1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 67, 105, 201, 315, 335, 469, 603, 1005, 1407, 2345, 3015, 4221, 7035

Step-4: Factors of 21124

List of positive integer factors of 21124 that divides 21105 without a remainder.

1, 2, 4, 5281, 10562

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21105 and 21124. The biggest common factor number is the GCF number.
So the greatest common factor 21105 and 21124 is 1.

Also check out the Least Common Multiple of 21105 and 21124