What is the Greatest Common Factor of 15657 and 15666?

Greatest common factor (GCF) of 15657 and 15666 is 3.

GCF(15657,15666) = 3

We will now calculate the prime factors of 15657 and 15666, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15657 and 15666.

How to find the GCF of 15657 and 15666?

We will first find the prime factorization of 15657 and 15666. After we will calculate the factors of 15657 and 15666 and find the biggest common factor number .

Step-1: Prime Factorization of 15657

Prime factors of 15657 are 3, 17, 307. Prime factorization of 15657 in exponential form is:

15657 = 3¹ × 17¹ × 307¹

Step-2: Prime Factorization of 15666

Prime factors of 15666 are 2, 3, 7, 373. Prime factorization of 15666 in exponential form is:

15666 = 2¹ × 3¹ × 7¹ × 373¹

Step-3: Factors of 15657

List of positive integer factors of 15657 that divides 15657 without a remainder.

1, 3, 17, 51, 307, 921, 5219

Step-4: Factors of 15666

List of positive integer factors of 15666 that divides 15657 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42, 373, 746, 1119, 2238, 2611, 5222, 7833

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15657 and 15666. The biggest common factor number is the GCF number.
So the greatest common factor 15657 and 15666 is 3.

Also check out the Least Common Multiple of 15657 and 15666