What is the Greatest Common Factor of 25560 and 25578?

Greatest common factor (GCF) of 25560 and 25578 is 18.

GCF(25560,25578) = 18

We will now calculate the prime factors of 25560 and 25578, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 25560 and 25578.

How to find the GCF of 25560 and 25578?

We will first find the prime factorization of 25560 and 25578. After we will calculate the factors of 25560 and 25578 and find the biggest common factor number .

Step-1: Prime Factorization of 25560

Prime factors of 25560 are 2, 3, 5, 71. Prime factorization of 25560 in exponential form is:

25560 = 2³ × 3² × 5¹ × 71¹

Step-2: Prime Factorization of 25578

Prime factors of 25578 are 2, 3, 7, 29. Prime factorization of 25578 in exponential form is:

25578 = 2¹ × 3² × 7² × 29¹

Step-3: Factors of 25560

List of positive integer factors of 25560 that divides 25560 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 852, 1065, 1278, 1420, 1704, 2130, 2556, 2840, 3195, 4260, 5112, 6390, 8520, 12780

Step-4: Factors of 25578

List of positive integer factors of 25578 that divides 25560 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 29, 42, 49, 58, 63, 87, 98, 126, 147, 174, 203, 261, 294, 406, 441, 522, 609, 882, 1218, 1421, 1827, 2842, 3654, 4263, 8526, 12789

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 25560 and 25578. The biggest common factor number is the GCF number.
So the greatest common factor 25560 and 25578 is 18.

Also check out the Least Common Multiple of 25560 and 25578