What is the Greatest Common Factor of 25640 and 25658?

Greatest common factor (GCF) of 25640 and 25658 is 2.

GCF(25640,25658) = 2

We will now calculate the prime factors of 25640 and 25658, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25640 and 25658.

How to find the GCF of 25640 and 25658?

We will first find the prime factorization of 25640 and 25658. After we will calculate the factors of 25640 and 25658 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 25658

Prime factors of 25658 are 2, 12829. Prime factorization of 25658 in exponential form is:

25658 = 2¹ × 12829¹

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 25658

List of positive integer factors of 25658 that divides 25640 without a remainder.

1, 2, 12829

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25640 and 25658. The biggest common factor number is the GCF number.
So the greatest common factor 25640 and 25658 is 2.

Also check out the Least Common Multiple of 25640 and 25658