What is the Greatest Common Factor of 12315 and 12320?

Greatest common factor (GCF) of 12315 and 12320 is 5.

GCF(12315,12320) = 5

We will now calculate the prime factors of 12315 and 12320, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12315 and 12320.

How to find the GCF of 12315 and 12320?

We will first find the prime factorization of 12315 and 12320. After we will calculate the factors of 12315 and 12320 and find the biggest common factor number .

Step-1: Prime Factorization of 12315

Prime factors of 12315 are 3, 5, 821. Prime factorization of 12315 in exponential form is:

12315 = 3¹ × 5¹ × 821¹

Step-2: Prime Factorization of 12320

Prime factors of 12320 are 2, 5, 7, 11. Prime factorization of 12320 in exponential form is:

12320 = 2⁵ × 5¹ × 7¹ × 11¹

Step-3: Factors of 12315

List of positive integer factors of 12315 that divides 12315 without a remainder.

1, 3, 5, 15, 821, 2463, 4105

Step-4: Factors of 12320

List of positive integer factors of 12320 that divides 12315 without a remainder.

1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 160, 176, 220, 224, 280, 308, 352, 385, 440, 560, 616, 770, 880, 1120, 1232, 1540, 1760, 2464, 3080, 6160

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12315 and 12320. The biggest common factor number is the GCF number.
So the greatest common factor 12315 and 12320 is 5.

Also check out the Least Common Multiple of 12315 and 12320