What is the Greatest Common Factor of 39605 and 39620?

Greatest common factor (GCF) of 39605 and 39620 is 5.

GCF(39605,39620) = 5

We will now calculate the prime factors of 39605 and 39620, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39605 and 39620.

How to find the GCF of 39605 and 39620?

We will first find the prime factorization of 39605 and 39620. After we will calculate the factors of 39605 and 39620 and find the biggest common factor number .

Step-1: Prime Factorization of 39605

Prime factors of 39605 are 5, 89. Prime factorization of 39605 in exponential form is:

39605 = 5¹ × 89²

Step-2: Prime Factorization of 39620

Prime factors of 39620 are 2, 5, 7, 283. Prime factorization of 39620 in exponential form is:

39620 = 2² × 5¹ × 7¹ × 283¹

Step-3: Factors of 39605

List of positive integer factors of 39605 that divides 39605 without a remainder.

1, 5, 89, 445, 7921

Step-4: Factors of 39620

List of positive integer factors of 39620 that divides 39605 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 283, 566, 1132, 1415, 1981, 2830, 3962, 5660, 7924, 9905, 19810

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39605 and 39620. The biggest common factor number is the GCF number.
So the greatest common factor 39605 and 39620 is 5.

Also check out the Least Common Multiple of 39605 and 39620