What is the Greatest Common Factor of 28791 and 28809?

Greatest common factor (GCF) of 28791 and 28809 is 9.

GCF(28791,28809) = 9

We will now calculate the prime factors of 28791 and 28809, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28791 and 28809.

How to find the GCF of 28791 and 28809?

We will first find the prime factorization of 28791 and 28809. After we will calculate the factors of 28791 and 28809 and find the biggest common factor number .

Step-1: Prime Factorization of 28791

Prime factors of 28791 are 3, 7, 457. Prime factorization of 28791 in exponential form is:

28791 = 3² × 7¹ × 457¹

Step-2: Prime Factorization of 28809

Prime factors of 28809 are 3, 11, 97. Prime factorization of 28809 in exponential form is:

28809 = 3³ × 11¹ × 97¹

Step-3: Factors of 28791

List of positive integer factors of 28791 that divides 28791 without a remainder.

1, 3, 7, 9, 21, 63, 457, 1371, 3199, 4113, 9597

Step-4: Factors of 28809

List of positive integer factors of 28809 that divides 28791 without a remainder.

1, 3, 9, 11, 27, 33, 97, 99, 291, 297, 873, 1067, 2619, 3201, 9603

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28791 and 28809. The biggest common factor number is the GCF number.
So the greatest common factor 28791 and 28809 is 9.

Also check out the Least Common Multiple of 28791 and 28809