What is the Greatest Common Factor of 39015 and 39021?

Greatest common factor (GCF) of 39015 and 39021 is 3.

GCF(39015,39021) = 3

We will now calculate the prime factors of 39015 and 39021, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39015 and 39021.

How to find the GCF of 39015 and 39021?

We will first find the prime factorization of 39015 and 39021. After we will calculate the factors of 39015 and 39021 and find the biggest common factor number .

Step-1: Prime Factorization of 39015

Prime factors of 39015 are 3, 5, 17. Prime factorization of 39015 in exponential form is:

39015 = 3³ × 5¹ × 17²

Step-2: Prime Factorization of 39021

Prime factors of 39021 are 3, 13007. Prime factorization of 39021 in exponential form is:

39021 = 3¹ × 13007¹

Step-3: Factors of 39015

List of positive integer factors of 39015 that divides 39015 without a remainder.

1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 289, 459, 765, 867, 1445, 2295, 2601, 4335, 7803, 13005

Step-4: Factors of 39021

List of positive integer factors of 39021 that divides 39015 without a remainder.

1, 3, 13007

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39015 and 39021. The biggest common factor number is the GCF number.
So the greatest common factor 39015 and 39021 is 3.

Also check out the Least Common Multiple of 39015 and 39021