What is the Greatest Common Factor of 40378 and 40391?

Greatest common factor (GCF) of 40378 and 40391 is 13.

GCF(40378,40391) = 13

We will now calculate the prime factors of 40378 and 40391, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 40378 and 40391.

How to find the GCF of 40378 and 40391?

We will first find the prime factorization of 40378 and 40391. After we will calculate the factors of 40378 and 40391 and find the biggest common factor number .

Step-1: Prime Factorization of 40378

Prime factors of 40378 are 2, 13, 1553. Prime factorization of 40378 in exponential form is:

40378 = 2¹ × 13¹ × 1553¹

Step-2: Prime Factorization of 40391

Prime factors of 40391 are 13, 239. Prime factorization of 40391 in exponential form is:

40391 = 13² × 239¹

Step-3: Factors of 40378

List of positive integer factors of 40378 that divides 40378 without a remainder.

1, 2, 13, 26, 1553, 3106, 20189

Step-4: Factors of 40391

List of positive integer factors of 40391 that divides 40378 without a remainder.

1, 13, 169, 239, 3107

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 40378 and 40391. The biggest common factor number is the GCF number.
So the greatest common factor 40378 and 40391 is 13.

Also check out the Least Common Multiple of 40378 and 40391