What is the Greatest Common Factor of 13965 and 13978?

Greatest common factor (GCF) of 13965 and 13978 is 1.

GCF(13965,13978) = 1

We will now calculate the prime factors of 13965 and 13978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 13965 and 13978.

How to find the GCF of 13965 and 13978?

We will first find the prime factorization of 13965 and 13978. After we will calculate the factors of 13965 and 13978 and find the biggest common factor number .

Step-1: Prime Factorization of 13965

Prime factors of 13965 are 3, 5, 7, 19. Prime factorization of 13965 in exponential form is:

13965 = 3¹ × 5¹ × 7² × 19¹

Step-2: Prime Factorization of 13978

Prime factors of 13978 are 2, 29, 241. Prime factorization of 13978 in exponential form is:

13978 = 2¹ × 29¹ × 241¹

Step-3: Factors of 13965

List of positive integer factors of 13965 that divides 13965 without a remainder.

1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1995, 2793, 4655

Step-4: Factors of 13978

List of positive integer factors of 13978 that divides 13965 without a remainder.

1, 2, 29, 58, 241, 482, 6989

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 13965 and 13978. The biggest common factor number is the GCF number.
So the greatest common factor 13965 and 13978 is 1.

Also check out the Least Common Multiple of 13965 and 13978