What is the Greatest Common Factor of 15771 and 15786?

Greatest common factor (GCF) of 15771 and 15786 is 3.

GCF(15771,15786) = 3

We will now calculate the prime factors of 15771 and 15786, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15771 and 15786.

How to find the GCF of 15771 and 15786?

We will first find the prime factorization of 15771 and 15786. After we will calculate the factors of 15771 and 15786 and find the biggest common factor number .

Step-1: Prime Factorization of 15771

Prime factors of 15771 are 3, 7, 751. Prime factorization of 15771 in exponential form is:

15771 = 3¹ × 7¹ × 751¹

Step-2: Prime Factorization of 15786

Prime factors of 15786 are 2, 3, 877. Prime factorization of 15786 in exponential form is:

15786 = 2¹ × 3² × 877¹

Step-3: Factors of 15771

List of positive integer factors of 15771 that divides 15771 without a remainder.

1, 3, 7, 21, 751, 2253, 5257

Step-4: Factors of 15786

List of positive integer factors of 15786 that divides 15771 without a remainder.

1, 2, 3, 6, 9, 18, 877, 1754, 2631, 5262, 7893

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15771 and 15786. The biggest common factor number is the GCF number.
So the greatest common factor 15771 and 15786 is 3.

Also check out the Least Common Multiple of 15771 and 15786