What is the Greatest Common Factor of 16491 and 16509?

Greatest common factor (GCF) of 16491 and 16509 is 3.

GCF(16491,16509) = 3

We will now calculate the prime factors of 16491 and 16509, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16491 and 16509.

How to find the GCF of 16491 and 16509?

We will first find the prime factorization of 16491 and 16509. After we will calculate the factors of 16491 and 16509 and find the biggest common factor number .

Step-1: Prime Factorization of 16491

Prime factors of 16491 are 3, 23, 239. Prime factorization of 16491 in exponential form is:

16491 = 3¹ × 23¹ × 239¹

Step-2: Prime Factorization of 16509

Prime factors of 16509 are 3, 5503. Prime factorization of 16509 in exponential form is:

16509 = 3¹ × 5503¹

Step-3: Factors of 16491

List of positive integer factors of 16491 that divides 16491 without a remainder.

1, 3, 23, 69, 239, 717, 5497

Step-4: Factors of 16509

List of positive integer factors of 16509 that divides 16491 without a remainder.

1, 3, 5503

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16491 and 16509. The biggest common factor number is the GCF number.
So the greatest common factor 16491 and 16509 is 3.

Also check out the Least Common Multiple of 16491 and 16509