What is the Greatest Common Factor of 21249 and 21258?

Greatest common factor (GCF) of 21249 and 21258 is 9.

GCF(21249,21258) = 9

We will now calculate the prime factors of 21249 and 21258, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21249 and 21258.

How to find the GCF of 21249 and 21258?

We will first find the prime factorization of 21249 and 21258. After we will calculate the factors of 21249 and 21258 and find the biggest common factor number .

Step-1: Prime Factorization of 21249

Prime factors of 21249 are 3, 787. Prime factorization of 21249 in exponential form is:

21249 = 3³ × 787¹

Step-2: Prime Factorization of 21258

Prime factors of 21258 are 2, 3, 1181. Prime factorization of 21258 in exponential form is:

21258 = 2¹ × 3² × 1181¹

Step-3: Factors of 21249

List of positive integer factors of 21249 that divides 21249 without a remainder.

1, 3, 9, 27, 787, 2361, 7083

Step-4: Factors of 21258

List of positive integer factors of 21258 that divides 21249 without a remainder.

1, 2, 3, 6, 9, 18, 1181, 2362, 3543, 7086, 10629

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21249 and 21258. The biggest common factor number is the GCF number.
So the greatest common factor 21249 and 21258 is 9.

Also check out the Least Common Multiple of 21249 and 21258