What is the Greatest Common Factor of 15861 and 15873?

Greatest common factor (GCF) of 15861 and 15873 is 3.

GCF(15861,15873) = 3

We will now calculate the prime factors of 15861 and 15873, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15861 and 15873.

How to find the GCF of 15861 and 15873?

We will first find the prime factorization of 15861 and 15873. After we will calculate the factors of 15861 and 15873 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 15873

Prime factors of 15873 are 3, 11, 13, 37. Prime factorization of 15873 in exponential form is:

15873 = 3¹ × 11¹ × 13¹ × 37¹

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 15873

List of positive integer factors of 15873 that divides 15861 without a remainder.

1, 3, 11, 13, 33, 37, 39, 111, 143, 407, 429, 481, 1221, 1443, 5291

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15861 and 15873. The biggest common factor number is the GCF number.
So the greatest common factor 15861 and 15873 is 3.

Also check out the Least Common Multiple of 15861 and 15873