What is the Greatest Common Factor of 17915 and 17920?

Greatest common factor (GCF) of 17915 and 17920 is 5.

GCF(17915,17920) = 5

We will now calculate the prime factors of 17915 and 17920, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 17915 and 17920.

How to find the GCF of 17915 and 17920?

We will first find the prime factorization of 17915 and 17920. After we will calculate the factors of 17915 and 17920 and find the biggest common factor number .

Step-1: Prime Factorization of 17915

Prime factors of 17915 are 5, 3583. Prime factorization of 17915 in exponential form is:

17915 = 5¹ × 3583¹

Step-2: Prime Factorization of 17920

Prime factors of 17920 are 2, 5, 7. Prime factorization of 17920 in exponential form is:

17920 = 2⁹ × 5¹ × 7¹

Step-3: Factors of 17915

List of positive integer factors of 17915 that divides 17915 without a remainder.

1, 5, 3583

Step-4: Factors of 17920

List of positive integer factors of 17920 that divides 17915 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 512, 560, 640, 896, 1120, 1280, 1792, 2240, 2560, 3584, 4480, 8960

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 17915 and 17920. The biggest common factor number is the GCF number.
So the greatest common factor 17915 and 17920 is 5.

Also check out the Least Common Multiple of 17915 and 17920