What is the Greatest Common Factor of 15855 and 15867?

Greatest common factor (GCF) of 15855 and 15867 is 3.

GCF(15855,15867) = 3

We will now calculate the prime factors of 15855 and 15867, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15855 and 15867.

How to find the GCF of 15855 and 15867?

We will first find the prime factorization of 15855 and 15867. After we will calculate the factors of 15855 and 15867 and find the biggest common factor number .

Step-1: Prime Factorization of 15855

Prime factors of 15855 are 3, 5, 7, 151. Prime factorization of 15855 in exponential form is:

15855 = 3¹ × 5¹ × 7¹ × 151¹

Step-2: Prime Factorization of 15867

Prime factors of 15867 are 3, 41, 43. Prime factorization of 15867 in exponential form is:

15867 = 3² × 41¹ × 43¹

Step-3: Factors of 15855

List of positive integer factors of 15855 that divides 15855 without a remainder.

1, 3, 5, 7, 15, 21, 35, 105, 151, 453, 755, 1057, 2265, 3171, 5285

Step-4: Factors of 15867

List of positive integer factors of 15867 that divides 15855 without a remainder.

1, 3, 9, 41, 43, 123, 129, 369, 387, 1763, 5289

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15855 and 15867. The biggest common factor number is the GCF number.
So the greatest common factor 15855 and 15867 is 3.

Also check out the Least Common Multiple of 15855 and 15867