What is the Greatest Common Factor of 31791 and 31809?

Greatest common factor (GCF) of 31791 and 31809 is 3.

GCF(31791,31809) = 3

We will now calculate the prime factors of 31791 and 31809, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31791 and 31809.

How to find the GCF of 31791 and 31809?

We will first find the prime factorization of 31791 and 31809. After we will calculate the factors of 31791 and 31809 and find the biggest common factor number .

Step-1: Prime Factorization of 31791

Prime factors of 31791 are 3, 10597. Prime factorization of 31791 in exponential form is:

31791 = 3¹ × 10597¹

Step-2: Prime Factorization of 31809

Prime factors of 31809 are 3, 23, 461. Prime factorization of 31809 in exponential form is:

31809 = 3¹ × 23¹ × 461¹

Step-3: Factors of 31791

List of positive integer factors of 31791 that divides 31791 without a remainder.

1, 3, 10597

Step-4: Factors of 31809

List of positive integer factors of 31809 that divides 31791 without a remainder.

1, 3, 23, 69, 461, 1383, 10603

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31791 and 31809. The biggest common factor number is the GCF number.
So the greatest common factor 31791 and 31809 is 3.

Also check out the Least Common Multiple of 31791 and 31809