What is the Greatest Common Factor of 63855 and 63861?

Greatest common factor (GCF) of 63855 and 63861 is 3.

GCF(63855,63861) = 3

We will now calculate the prime factors of 63855 and 63861, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 63855 and 63861.

How to find the GCF of 63855 and 63861?

We will first find the prime factorization of 63855 and 63861. After we will calculate the factors of 63855 and 63861 and find the biggest common factor number .

Step-1: Prime Factorization of 63855

Prime factors of 63855 are 3, 5, 11, 43. Prime factorization of 63855 in exponential form is:

63855 = 3³ × 5¹ × 11¹ × 43¹

Step-2: Prime Factorization of 63861

Prime factors of 63861 are 3, 7, 3041. Prime factorization of 63861 in exponential form is:

63861 = 3¹ × 7¹ × 3041¹

Step-3: Factors of 63855

List of positive integer factors of 63855 that divides 63855 without a remainder.

1, 3, 5, 9, 11, 15, 27, 33, 43, 45, 55, 99, 129, 135, 165, 215, 297, 387, 473, 495, 645, 1161, 1419, 1485, 1935, 2365, 4257, 5805, 7095, 12771, 21285

Step-4: Factors of 63861

List of positive integer factors of 63861 that divides 63855 without a remainder.

1, 3, 7, 21, 3041, 9123, 21287

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 63855 and 63861. The biggest common factor number is the GCF number.
So the greatest common factor 63855 and 63861 is 3.

Also check out the Least Common Multiple of 63855 and 63861