What is the Greatest Common Factor of 39979 and 39990?

Greatest common factor (GCF) of 39979 and 39990 is 1.

GCF(39979,39990) = 1

We will now calculate the prime factors of 39979 and 39990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39979 and 39990.

How to find the GCF of 39979 and 39990?

We will first find the prime factorization of 39979 and 39990. After we will calculate the factors of 39979 and 39990 and find the biggest common factor number .

Step-1: Prime Factorization of 39979

Prime factors of 39979 are 39979. Prime factorization of 39979 in exponential form is:

39979 = 39979¹

Step-2: Prime Factorization of 39990

Prime factors of 39990 are 2, 3, 5, 31, 43. Prime factorization of 39990 in exponential form is:

39990 = 2¹ × 3¹ × 5¹ × 31¹ × 43¹

Step-3: Factors of 39979

List of positive integer factors of 39979 that divides 39979 without a remainder.

Step-4: Factors of 39990

List of positive integer factors of 39990 that divides 39979 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 31, 43, 62, 86, 93, 129, 155, 186, 215, 258, 310, 430, 465, 645, 930, 1290, 1333, 2666, 3999, 6665, 7998, 13330, 19995

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39979 and 39990. The biggest common factor number is the GCF number.
So the greatest common factor 39979 and 39990 is 1.

Also check out the Least Common Multiple of 39979 and 39990