What is the Greatest Common Factor of 25605 and 25620?

Greatest common factor (GCF) of 25605 and 25620 is 15.

GCF(25605,25620) = 15

We will now calculate the prime factors of 25605 and 25620, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25605 and 25620.

How to find the GCF of 25605 and 25620?

We will first find the prime factorization of 25605 and 25620. After we will calculate the factors of 25605 and 25620 and find the biggest common factor number .

Step-1: Prime Factorization of 25605

Prime factors of 25605 are 3, 5, 569. Prime factorization of 25605 in exponential form is:

25605 = 3² × 5¹ × 569¹

Step-2: 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-3: Factors of 25605

List of positive integer factors of 25605 that divides 25605 without a remainder.

1, 3, 5, 9, 15, 45, 569, 1707, 2845, 5121, 8535

Step-4: Factors of 25620

List of positive integer factors of 25620 that divides 25605 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25605 and 25620. The biggest common factor number is the GCF number.
So the greatest common factor 25605 and 25620 is 15.

Also check out the Least Common Multiple of 25605 and 25620