What is the Greatest Common Factor of 39978 and 39986?

Greatest common factor (GCF) of 39978 and 39986 is 2.

GCF(39978,39986) = 2

We will now calculate the prime factors of 39978 and 39986, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39978 and 39986.

How to find the GCF of 39978 and 39986?

We will first find the prime factorization of 39978 and 39986. After we will calculate the factors of 39978 and 39986 and find the biggest common factor number .

Step-1: Prime Factorization of 39978

Prime factors of 39978 are 2, 3, 2221. Prime factorization of 39978 in exponential form is:

39978 = 2¹ × 3² × 2221¹

Step-2: Prime Factorization of 39986

Prime factors of 39986 are 2, 19993. Prime factorization of 39986 in exponential form is:

39986 = 2¹ × 19993¹

Step-3: Factors of 39978

List of positive integer factors of 39978 that divides 39978 without a remainder.

1, 2, 3, 6, 9, 18, 2221, 4442, 6663, 13326, 19989

Step-4: Factors of 39986

List of positive integer factors of 39986 that divides 39978 without a remainder.

1, 2, 19993

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39978 and 39986. The biggest common factor number is the GCF number.
So the greatest common factor 39978 and 39986 is 2.

Also check out the Least Common Multiple of 39978 and 39986