What is the Greatest Common Factor of 15623 and 15640?

Greatest common factor (GCF) of 15623 and 15640 is 17.

GCF(15623,15640) = 17

We will now calculate the prime factors of 15623 and 15640, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15623 and 15640.

How to find the GCF of 15623 and 15640?

We will first find the prime factorization of 15623 and 15640. After we will calculate the factors of 15623 and 15640 and find the biggest common factor number .

Step-1: Prime Factorization of 15623

Prime factors of 15623 are 17, 919. Prime factorization of 15623 in exponential form is:

15623 = 17¹ × 919¹

Step-2: Prime Factorization of 15640

Prime factors of 15640 are 2, 5, 17, 23. Prime factorization of 15640 in exponential form is:

15640 = 2³ × 5¹ × 17¹ × 23¹

Step-3: Factors of 15623

List of positive integer factors of 15623 that divides 15623 without a remainder.

1, 17, 919

Step-4: Factors of 15640

List of positive integer factors of 15640 that divides 15623 without a remainder.

1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1564, 1955, 3128, 3910, 7820

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15623 and 15640. The biggest common factor number is the GCF number.
So the greatest common factor 15623 and 15640 is 17.

Also check out the Least Common Multiple of 15623 and 15640