What is the Greatest Common Factor of 6378 and 6390?

Greatest common factor (GCF) of 6378 and 6390 is 6.

GCF(6378,6390) = 6

We will now calculate the prime factors of 6378 and 6390, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 6378 and 6390.

How to find the GCF of 6378 and 6390?

We will first find the prime factorization of 6378 and 6390. After we will calculate the factors of 6378 and 6390 and find the biggest common factor number .

Step-1: Prime Factorization of 6378

Prime factors of 6378 are 2, 3, 1063. Prime factorization of 6378 in exponential form is:

6378 = 2¹ × 3¹ × 1063¹

Step-2: Prime Factorization of 6390

Prime factors of 6390 are 2, 3, 5, 71. Prime factorization of 6390 in exponential form is:

6390 = 2¹ × 3² × 5¹ × 71¹

Step-3: Factors of 6378

List of positive integer factors of 6378 that divides 6378 without a remainder.

1, 2, 3, 6, 1063, 2126, 3189

Step-4: Factors of 6390

List of positive integer factors of 6390 that divides 6378 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 71, 90, 142, 213, 355, 426, 639, 710, 1065, 1278, 2130, 3195

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 6378 and 6390. The biggest common factor number is the GCF number.
So the greatest common factor 6378 and 6390 is 6.

Also check out the Least Common Multiple of 6378 and 6390