What is the Greatest Common Factor of 39 and 47?

Greatest common factor (GCF) of 39 and 47 is 1.

GCF(39,47) = 1

We will now calculate the prime factors of 39 and 47, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39 and 47.

How to find the GCF of 39 and 47?

We will first find the prime factorization of 39 and 47. After we will calculate the factors of 39 and 47 and find the biggest common factor number .

Step-1: Prime Factorization of 39

Prime factors of 39 are 3, 13. Prime factorization of 39 in exponential form is:

39 = 3¹ × 13¹

Step-2: Prime Factorization of 47

Prime factors of 47 are 47. Prime factorization of 47 in exponential form is:

47 = 47¹

Step-3: Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1, 3, 13

Step-4: Factors of 47

List of positive integer factors of 47 that divides 39 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39 and 47. The biggest common factor number is the GCF number.
So the greatest common factor 39 and 47 is 1.

Also check out the Least Common Multiple of 39 and 47