What is the Greatest Common Factor of 15903 and 15909?

Greatest common factor (GCF) of 15903 and 15909 is 3.

GCF(15903,15909) = 3

We will now calculate the prime factors of 15903 and 15909, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15903 and 15909.

How to find the GCF of 15903 and 15909?

We will first find the prime factorization of 15903 and 15909. After we will calculate the factors of 15903 and 15909 and find the biggest common factor number .

Step-1: Prime Factorization of 15903

Prime factors of 15903 are 3, 19, 31. Prime factorization of 15903 in exponential form is:

15903 = 3³ × 19¹ × 31¹

Step-2: Prime Factorization of 15909

Prime factors of 15909 are 3, 5303. Prime factorization of 15909 in exponential form is:

15909 = 3¹ × 5303¹

Step-3: Factors of 15903

List of positive integer factors of 15903 that divides 15903 without a remainder.

1, 3, 9, 19, 27, 31, 57, 93, 171, 279, 513, 589, 837, 1767, 5301

Step-4: Factors of 15909

List of positive integer factors of 15909 that divides 15903 without a remainder.

1, 3, 5303

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15903 and 15909. The biggest common factor number is the GCF number.
So the greatest common factor 15903 and 15909 is 3.

Also check out the Least Common Multiple of 15903 and 15909