What is the Greatest Common Factor of 25620 and 25640?

Greatest common factor (GCF) of 25620 and 25640 is 20.

GCF(25620,25640) = 20

We will now calculate the prime factors of 25620 and 25640, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25620 and 25640.

How to find the GCF of 25620 and 25640?

We will first find the prime factorization of 25620 and 25640. After we will calculate the factors of 25620 and 25640 and find the biggest common factor number .

Step-1: Prime Factorization of 25620

Prime factors of 25620 are 2, 3, 5, 7, 61. Prime factorization of 25620 in exponential form is:

25620 = 2² × 3¹ × 5¹ × 7¹ × 61¹

Step-2: 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-3: Factors of 25620

List of positive integer factors of 25620 that divides 25620 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 61, 70, 84, 105, 122, 140, 183, 210, 244, 305, 366, 420, 427, 610, 732, 854, 915, 1220, 1281, 1708, 1830, 2135, 2562, 3660, 4270, 5124, 6405, 8540, 12810

Step-4: Factors of 25640

List of positive integer factors of 25640 that divides 25620 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25620 and 25640. The biggest common factor number is the GCF number.
So the greatest common factor 25620 and 25640 is 20.

Also check out the Least Common Multiple of 25620 and 25640