What is the Greatest Common Factor of 78978 and 78990?

Greatest common factor (GCF) of 78978 and 78990 is 6.

GCF(78978,78990) = 6

We will now calculate the prime factors of 78978 and 78990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78978 and 78990.

How to find the GCF of 78978 and 78990?

We will first find the prime factorization of 78978 and 78990. After we will calculate the factors of 78978 and 78990 and find the biggest common factor number .

Step-1: Prime Factorization of 78978

Prime factors of 78978 are 2, 3, 13163. Prime factorization of 78978 in exponential form is:

78978 = 2¹ × 3¹ × 13163¹

Step-2: Prime Factorization of 78990

Prime factors of 78990 are 2, 3, 5, 2633. Prime factorization of 78990 in exponential form is:

78990 = 2¹ × 3¹ × 5¹ × 2633¹

Step-3: Factors of 78978

List of positive integer factors of 78978 that divides 78978 without a remainder.

1, 2, 3, 6, 13163, 26326, 39489

Step-4: Factors of 78990

List of positive integer factors of 78990 that divides 78978 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 2633, 5266, 7899, 13165, 15798, 26330, 39495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78978 and 78990. The biggest common factor number is the GCF number.
So the greatest common factor 78978 and 78990 is 6.

Also check out the Least Common Multiple of 78978 and 78990