What is the Greatest Common Factor of 20315 and 20320?

Greatest common factor (GCF) of 20315 and 20320 is 5.

GCF(20315,20320) = 5

We will now calculate the prime factors of 20315 and 20320, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20315 and 20320.

How to find the GCF of 20315 and 20320?

We will first find the prime factorization of 20315 and 20320. After we will calculate the factors of 20315 and 20320 and find the biggest common factor number .

Step-1: Prime Factorization of 20315

Prime factors of 20315 are 5, 17, 239. Prime factorization of 20315 in exponential form is:

20315 = 5¹ × 17¹ × 239¹

Step-2: Prime Factorization of 20320

Prime factors of 20320 are 2, 5, 127. Prime factorization of 20320 in exponential form is:

20320 = 2⁵ × 5¹ × 127¹

Step-3: Factors of 20315

List of positive integer factors of 20315 that divides 20315 without a remainder.

1, 5, 17, 85, 239, 1195, 4063

Step-4: Factors of 20320

List of positive integer factors of 20320 that divides 20315 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1270, 2032, 2540, 4064, 5080, 10160

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20315 and 20320. The biggest common factor number is the GCF number.
So the greatest common factor 20315 and 20320 is 5.

Also check out the Least Common Multiple of 20315 and 20320