What is the Greatest Common Factor of 39978 and 39987?

Greatest common factor (GCF) of 39978 and 39987 is 9.

GCF(39978,39987) = 9

We will now calculate the prime factors of 39978 and 39987, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39978 and 39987.

How to find the GCF of 39978 and 39987?

We will first find the prime factorization of 39978 and 39987. After we will calculate the factors of 39978 and 39987 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 39987

Prime factors of 39987 are 3, 1481. Prime factorization of 39987 in exponential form is:

39987 = 3³ × 1481¹

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 39987

List of positive integer factors of 39987 that divides 39978 without a remainder.

1, 3, 9, 27, 1481, 4443, 13329

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39978 and 39987. The biggest common factor number is the GCF number.
So the greatest common factor 39978 and 39987 is 9.

Also check out the Least Common Multiple of 39978 and 39987