What is the Greatest Common Factor of 39955 and 39970?

Greatest common factor (GCF) of 39955 and 39970 is 5.

GCF(39955,39970) = 5

We will now calculate the prime factors of 39955 and 39970, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39955 and 39970.

How to find the GCF of 39955 and 39970?

We will first find the prime factorization of 39955 and 39970. After we will calculate the factors of 39955 and 39970 and find the biggest common factor number .

Step-1: Prime Factorization of 39955

Prime factors of 39955 are 5, 61, 131. Prime factorization of 39955 in exponential form is:

39955 = 5¹ × 61¹ × 131¹

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 39955

List of positive integer factors of 39955 that divides 39955 without a remainder.

1, 5, 61, 131, 305, 655, 7991

Step-4: Factors of 39970

List of positive integer factors of 39970 that divides 39955 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 39955 and 39970. The biggest common factor number is the GCF number.
So the greatest common factor 39955 and 39970 is 5.

Also check out the Least Common Multiple of 39955 and 39970