What is the Greatest Common Factor of 2691 and 2709?

Greatest common factor (GCF) of 2691 and 2709 is 9.

GCF(2691,2709) = 9

We will now calculate the prime factors of 2691 and 2709, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2691 and 2709.

How to find the GCF of 2691 and 2709?

We will first find the prime factorization of 2691 and 2709. After we will calculate the factors of 2691 and 2709 and find the biggest common factor number .

Step-1: Prime Factorization of 2691

Prime factors of 2691 are 3, 13, 23. Prime factorization of 2691 in exponential form is:

2691 = 3² × 13¹ × 23¹

Step-2: Prime Factorization of 2709

Prime factors of 2709 are 3, 7, 43. Prime factorization of 2709 in exponential form is:

2709 = 3² × 7¹ × 43¹

Step-3: Factors of 2691

List of positive integer factors of 2691 that divides 2691 without a remainder.

1, 3, 9, 13, 23, 39, 69, 117, 207, 299, 897

Step-4: Factors of 2709

List of positive integer factors of 2709 that divides 2691 without a remainder.

1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2691 and 2709. The biggest common factor number is the GCF number.
So the greatest common factor 2691 and 2709 is 9.

Also check out the Least Common Multiple of 2691 and 2709