What is the Greatest Common Factor of 39966 and 39970?

Greatest common factor (GCF) of 39966 and 39970 is 2.

GCF(39966,39970) = 2

We will now calculate the prime factors of 39966 and 39970, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39966 and 39970.

How to find the GCF of 39966 and 39970?

We will first find the prime factorization of 39966 and 39970. After we will calculate the factors of 39966 and 39970 and find the biggest common factor number .

Step-1: Prime Factorization of 39966

Prime factors of 39966 are 2, 3, 6661. Prime factorization of 39966 in exponential form is:

39966 = 2¹ × 3¹ × 6661¹

Step-2: Prime Factorization of 39970

Prime factors of 39970 are 2, 5, 7, 571. Prime factorization of 39970 in exponential form is:

39970 = 2¹ × 5¹ × 7¹ × 571¹

Step-3: Factors of 39966

List of positive integer factors of 39966 that divides 39966 without a remainder.

1, 2, 3, 6, 6661, 13322, 19983

Step-4: Factors of 39970

List of positive integer factors of 39970 that divides 39966 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70, 571, 1142, 2855, 3997, 5710, 7994, 19985

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39966 and 39970. The biggest common factor number is the GCF number.
So the greatest common factor 39966 and 39970 is 2.

Also check out the Least Common Multiple of 39966 and 39970