What is the Greatest Common Factor of 15500 and 15520?

Greatest common factor (GCF) of 15500 and 15520 is 20.

GCF(15500,15520) = 20

We will now calculate the prime factors of 15500 and 15520, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15500 and 15520.

How to find the GCF of 15500 and 15520?

We will first find the prime factorization of 15500 and 15520. After we will calculate the factors of 15500 and 15520 and find the biggest common factor number .

Step-1: Prime Factorization of 15500

Prime factors of 15500 are 2, 5, 31. Prime factorization of 15500 in exponential form is:

15500 = 2² × 5³ × 31¹

Step-2: Prime Factorization of 15520

Prime factors of 15520 are 2, 5, 97. Prime factorization of 15520 in exponential form is:

15520 = 2⁵ × 5¹ × 97¹

Step-3: Factors of 15500

List of positive integer factors of 15500 that divides 15500 without a remainder.

1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 250, 310, 500, 620, 775, 1550, 3100, 3875, 7750

Step-4: Factors of 15520

List of positive integer factors of 15520 that divides 15500 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 97, 160, 194, 388, 485, 776, 970, 1552, 1940, 3104, 3880, 7760

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15500 and 15520. The biggest common factor number is the GCF number.
So the greatest common factor 15500 and 15520 is 20.

Also check out the Least Common Multiple of 15500 and 15520