What is the Greatest Common Factor of 28315 and 28320?

Greatest common factor (GCF) of 28315 and 28320 is 5.

GCF(28315,28320) = 5

We will now calculate the prime factors of 28315 and 28320, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 28315 and 28320.

How to find the GCF of 28315 and 28320?

We will first find the prime factorization of 28315 and 28320. After we will calculate the factors of 28315 and 28320 and find the biggest common factor number .

Step-1: Prime Factorization of 28315

Prime factors of 28315 are 5, 7, 809. Prime factorization of 28315 in exponential form is:

28315 = 5¹ × 7¹ × 809¹

Step-2: Prime Factorization of 28320

Prime factors of 28320 are 2, 3, 5, 59. Prime factorization of 28320 in exponential form is:

28320 = 2⁵ × 3¹ × 5¹ × 59¹

Step-3: Factors of 28315

List of positive integer factors of 28315 that divides 28315 without a remainder.

1, 5, 7, 35, 809, 4045, 5663

Step-4: Factors of 28320

List of positive integer factors of 28320 that divides 28315 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 59, 60, 80, 96, 118, 120, 160, 177, 236, 240, 295, 354, 472, 480, 590, 708, 885, 944, 1180, 1416, 1770, 1888, 2360, 2832, 3540, 4720, 5664, 7080, 9440, 14160

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28315 and 28320. The biggest common factor number is the GCF number.
So the greatest common factor 28315 and 28320 is 5.

Also check out the Least Common Multiple of 28315 and 28320