What is the Greatest Common Factor of 39980 and 39985?

Greatest common factor (GCF) of 39980 and 39985 is 5.

GCF(39980,39985) = 5

We will now calculate the prime factors of 39980 and 39985, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39980 and 39985.

How to find the GCF of 39980 and 39985?

We will first find the prime factorization of 39980 and 39985. After we will calculate the factors of 39980 and 39985 and find the biggest common factor number .

Step-1: Prime Factorization of 39980

Prime factors of 39980 are 2, 5, 1999. Prime factorization of 39980 in exponential form is:

39980 = 2² × 5¹ × 1999¹

Step-2: Prime Factorization of 39985

Prime factors of 39985 are 5, 11, 727. Prime factorization of 39985 in exponential form is:

39985 = 5¹ × 11¹ × 727¹

Step-3: Factors of 39980

List of positive integer factors of 39980 that divides 39980 without a remainder.

1, 2, 4, 5, 10, 20, 1999, 3998, 7996, 9995, 19990

Step-4: Factors of 39985

List of positive integer factors of 39985 that divides 39980 without a remainder.

1, 5, 11, 55, 727, 3635, 7997

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39980 and 39985. The biggest common factor number is the GCF number.
So the greatest common factor 39980 and 39985 is 5.

Also check out the Least Common Multiple of 39980 and 39985