What is the Greatest Common Factor of 15861 and 15875?

Greatest common factor (GCF) of 15861 and 15875 is 1.

GCF(15861,15875) = 1

We will now calculate the prime factors of 15861 and 15875, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15861 and 15875.

How to find the GCF of 15861 and 15875?

We will first find the prime factorization of 15861 and 15875. After we will calculate the factors of 15861 and 15875 and find the biggest common factor number .

Step-1: Prime Factorization of 15861

Prime factors of 15861 are 3, 17, 311. Prime factorization of 15861 in exponential form is:

15861 = 3¹ × 17¹ × 311¹

Step-2: Prime Factorization of 15875

Prime factors of 15875 are 5, 127. Prime factorization of 15875 in exponential form is:

15875 = 5³ × 127¹

Step-3: Factors of 15861

List of positive integer factors of 15861 that divides 15861 without a remainder.

1, 3, 17, 51, 311, 933, 5287

Step-4: Factors of 15875

List of positive integer factors of 15875 that divides 15861 without a remainder.

1, 5, 25, 125, 127, 635, 3175

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15861 and 15875. The biggest common factor number is the GCF number.
So the greatest common factor 15861 and 15875 is 1.

Also check out the Least Common Multiple of 15861 and 15875