What is the Greatest Common Factor of 25640 and 25646?

Greatest common factor (GCF) of 25640 and 25646 is 2.

GCF(25640,25646) = 2

We will now calculate the prime factors of 25640 and 25646, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25640 and 25646.

How to find the GCF of 25640 and 25646?

We will first find the prime factorization of 25640 and 25646. After we will calculate the factors of 25640 and 25646 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 25646

Prime factors of 25646 are 2, 12823. Prime factorization of 25646 in exponential form is:

25646 = 2¹ × 12823¹

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 25646

List of positive integer factors of 25646 that divides 25640 without a remainder.

1, 2, 12823

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25640 and 25646. The biggest common factor number is the GCF number.
So the greatest common factor 25640 and 25646 is 2.

Also check out the Least Common Multiple of 25640 and 25646