What is the Greatest Common Factor of 39640 and 39645?

Greatest common factor (GCF) of 39640 and 39645 is 5.

GCF(39640,39645) = 5

We will now calculate the prime factors of 39640 and 39645, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39640 and 39645.

How to find the GCF of 39640 and 39645?

We will first find the prime factorization of 39640 and 39645. After we will calculate the factors of 39640 and 39645 and find the biggest common factor number .

Step-1: Prime Factorization of 39640

Prime factors of 39640 are 2, 5, 991. Prime factorization of 39640 in exponential form is:

39640 = 2³ × 5¹ × 991¹

Step-2: Prime Factorization of 39645

Prime factors of 39645 are 3, 5, 881. Prime factorization of 39645 in exponential form is:

39645 = 3² × 5¹ × 881¹

Step-3: Factors of 39640

List of positive integer factors of 39640 that divides 39640 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3964, 4955, 7928, 9910, 19820

Step-4: Factors of 39645

List of positive integer factors of 39645 that divides 39640 without a remainder.

1, 3, 5, 9, 15, 45, 881, 2643, 4405, 7929, 13215

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39640 and 39645. The biggest common factor number is the GCF number.
So the greatest common factor 39640 and 39645 is 5.

Also check out the Least Common Multiple of 39640 and 39645