What is the Greatest Common Factor of 39975 and 39981?

Greatest common factor (GCF) of 39975 and 39981 is 3.

GCF(39975,39981) = 3

We will now calculate the prime factors of 39975 and 39981, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39975 and 39981.

How to find the GCF of 39975 and 39981?

We will first find the prime factorization of 39975 and 39981. After we will calculate the factors of 39975 and 39981 and find the biggest common factor number .

Step-1: Prime Factorization of 39975

Prime factors of 39975 are 3, 5, 13, 41. Prime factorization of 39975 in exponential form is:

39975 = 3¹ × 5² × 13¹ × 41¹

Step-2: Prime Factorization of 39981

Prime factors of 39981 are 3, 13327. Prime factorization of 39981 in exponential form is:

39981 = 3¹ × 13327¹

Step-3: Factors of 39975

List of positive integer factors of 39975 that divides 39975 without a remainder.

1, 3, 5, 13, 15, 25, 39, 41, 65, 75, 123, 195, 205, 325, 533, 615, 975, 1025, 1599, 2665, 3075, 7995, 13325

Step-4: Factors of 39981

List of positive integer factors of 39981 that divides 39975 without a remainder.

1, 3, 13327

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39975 and 39981. The biggest common factor number is the GCF number.
So the greatest common factor 39975 and 39981 is 3.

Also check out the Least Common Multiple of 39975 and 39981