What is the Greatest Common Factor of 13491 and 13509?

Greatest common factor (GCF) of 13491 and 13509 is 9.

GCF(13491,13509) = 9

We will now calculate the prime factors of 13491 and 13509, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 13491 and 13509.

How to find the GCF of 13491 and 13509?

We will first find the prime factorization of 13491 and 13509. After we will calculate the factors of 13491 and 13509 and find the biggest common factor number .

Step-1: Prime Factorization of 13491

Prime factors of 13491 are 3, 1499. Prime factorization of 13491 in exponential form is:

13491 = 3² × 1499¹

Step-2: Prime Factorization of 13509

Prime factors of 13509 are 3, 19, 79. Prime factorization of 13509 in exponential form is:

13509 = 3² × 19¹ × 79¹

Step-3: Factors of 13491

List of positive integer factors of 13491 that divides 13491 without a remainder.

1, 3, 9, 1499, 4497

Step-4: Factors of 13509

List of positive integer factors of 13509 that divides 13491 without a remainder.

1, 3, 9, 19, 57, 79, 171, 237, 711, 1501, 4503

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 13491 and 13509. The biggest common factor number is the GCF number.
So the greatest common factor 13491 and 13509 is 9.

Also check out the Least Common Multiple of 13491 and 13509