What is the Greatest Common Factor of 31509 and 31515?

Greatest common factor (GCF) of 31509 and 31515 is 3.

GCF(31509,31515) = 3

We will now calculate the prime factors of 31509 and 31515, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31509 and 31515.

How to find the GCF of 31509 and 31515?

We will first find the prime factorization of 31509 and 31515. After we will calculate the factors of 31509 and 31515 and find the biggest common factor number .

Step-1: Prime Factorization of 31509

Prime factors of 31509 are 3, 389. Prime factorization of 31509 in exponential form is:

31509 = 3⁴ × 389¹

Step-2: Prime Factorization of 31515

Prime factors of 31515 are 3, 5, 11, 191. Prime factorization of 31515 in exponential form is:

31515 = 3¹ × 5¹ × 11¹ × 191¹

Step-3: Factors of 31509

List of positive integer factors of 31509 that divides 31509 without a remainder.

1, 3, 9, 27, 81, 389, 1167, 3501, 10503

Step-4: Factors of 31515

List of positive integer factors of 31515 that divides 31509 without a remainder.

1, 3, 5, 11, 15, 33, 55, 165, 191, 573, 955, 2101, 2865, 6303, 10505

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31509 and 31515. The biggest common factor number is the GCF number.
So the greatest common factor 31509 and 31515 is 3.

Also check out the Least Common Multiple of 31509 and 31515