What is the Greatest Common Factor of 15963 and 15978?

Greatest common factor (GCF) of 15963 and 15978 is 3.

GCF(15963,15978) = 3

We will now calculate the prime factors of 15963 and 15978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15963 and 15978.

How to find the GCF of 15963 and 15978?

We will first find the prime factorization of 15963 and 15978. After we will calculate the factors of 15963 and 15978 and find the biggest common factor number .

Step-1: Prime Factorization of 15963

Prime factors of 15963 are 3, 17, 313. Prime factorization of 15963 in exponential form is:

15963 = 3¹ × 17¹ × 313¹

Step-2: Prime Factorization of 15978

Prime factors of 15978 are 2, 3, 2663. Prime factorization of 15978 in exponential form is:

15978 = 2¹ × 3¹ × 2663¹

Step-3: Factors of 15963

List of positive integer factors of 15963 that divides 15963 without a remainder.

1, 3, 17, 51, 313, 939, 5321

Step-4: Factors of 15978

List of positive integer factors of 15978 that divides 15963 without a remainder.

1, 2, 3, 6, 2663, 5326, 7989

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15963 and 15978. The biggest common factor number is the GCF number.
So the greatest common factor 15963 and 15978 is 3.

Also check out the Least Common Multiple of 15963 and 15978