What is the Greatest Common Factor of 25640 and 25657?

Greatest common factor (GCF) of 25640 and 25657 is 1.

GCF(25640,25657) = 1

We will now calculate the prime factors of 25640 and 25657, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25640 and 25657.

How to find the GCF of 25640 and 25657?

We will first find the prime factorization of 25640 and 25657. After we will calculate the factors of 25640 and 25657 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 25657

Prime factors of 25657 are 25657. Prime factorization of 25657 in exponential form is:

25657 = 25657¹

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 25657

List of positive integer factors of 25657 that divides 25640 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25640 and 25657. The biggest common factor number is the GCF number.
So the greatest common factor 25640 and 25657 is 1.

Also check out the Least Common Multiple of 25640 and 25657