What is the Greatest Common Factor of 13221 and 13239?

Greatest common factor (GCF) of 13221 and 13239 is 9.

GCF(13221,13239) = 9

We will now calculate the prime factors of 13221 and 13239, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 13221 and 13239.

How to find the GCF of 13221 and 13239?

We will first find the prime factorization of 13221 and 13239. After we will calculate the factors of 13221 and 13239 and find the biggest common factor number .

Step-1: Prime Factorization of 13221

Prime factors of 13221 are 3, 13, 113. Prime factorization of 13221 in exponential form is:

13221 = 3² × 13¹ × 113¹

Step-2: Prime Factorization of 13239

Prime factors of 13239 are 3, 1471. Prime factorization of 13239 in exponential form is:

13239 = 3² × 1471¹

Step-3: Factors of 13221

List of positive integer factors of 13221 that divides 13221 without a remainder.

1, 3, 9, 13, 39, 113, 117, 339, 1017, 1469, 4407

Step-4: Factors of 13239

List of positive integer factors of 13239 that divides 13221 without a remainder.

1, 3, 9, 1471, 4413

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 13221 and 13239. The biggest common factor number is the GCF number.
So the greatest common factor 13221 and 13239 is 9.

Also check out the Least Common Multiple of 13221 and 13239