What is the Greatest Common Factor of 25640 and 25660?

Greatest common factor (GCF) of 25640 and 25660 is 20.

GCF(25640,25660) = 20

We will now calculate the prime factors of 25640 and 25660, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25640 and 25660.

How to find the GCF of 25640 and 25660?

We will first find the prime factorization of 25640 and 25660. After we will calculate the factors of 25640 and 25660 and find the biggest common factor number .

Step-1: Prime Factorization of 25640

Prime factors of 25640 are 2, 5, 641. Prime factorization of 25640 in exponential form is:

25640 = 2³ × 5¹ × 641¹

Step-2: Prime Factorization of 25660

Prime factors of 25660 are 2, 5, 1283. Prime factorization of 25660 in exponential form is:

25660 = 2² × 5¹ × 1283¹

Step-3: Factors of 25640

List of positive integer factors of 25640 that divides 25640 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820

Step-4: Factors of 25660

List of positive integer factors of 25660 that divides 25640 without a remainder.

1, 2, 4, 5, 10, 20, 1283, 2566, 5132, 6415, 12830

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25640 and 25660. The biggest common factor number is the GCF number.
So the greatest common factor 25640 and 25660 is 20.

Also check out the Least Common Multiple of 25640 and 25660