What is the Greatest Common Factor of 15640 and 15655?

Greatest common factor (GCF) of 15640 and 15655 is 5.

GCF(15640,15655) = 5

We will now calculate the prime factors of 15640 and 15655, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15640 and 15655.

How to find the GCF of 15640 and 15655?

We will first find the prime factorization of 15640 and 15655. After we will calculate the factors of 15640 and 15655 and find the biggest common factor number .

Step-1: 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-2: Prime Factorization of 15655

Prime factors of 15655 are 5, 31, 101. Prime factorization of 15655 in exponential form is:

15655 = 5¹ × 31¹ × 101¹

Step-3: Factors of 15640

List of positive integer factors of 15640 that divides 15640 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

Step-4: Factors of 15655

List of positive integer factors of 15655 that divides 15640 without a remainder.

1, 5, 31, 101, 155, 505, 3131

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15640 and 15655. The biggest common factor number is the GCF number.
So the greatest common factor 15640 and 15655 is 5.

Also check out the Least Common Multiple of 15640 and 15655