What is the Greatest Common Factor of 1659 and 1668?

Greatest common factor (GCF) of 1659 and 1668 is 3.

GCF(1659,1668) = 3

We will now calculate the prime factors of 1659 and 1668, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1659 and 1668.

How to find the GCF of 1659 and 1668?

We will first find the prime factorization of 1659 and 1668. After we will calculate the factors of 1659 and 1668 and find the biggest common factor number .

Step-1: Prime Factorization of 1659

Prime factors of 1659 are 3, 7, 79. Prime factorization of 1659 in exponential form is:

1659 = 3¹ × 7¹ × 79¹

Step-2: Prime Factorization of 1668

Prime factors of 1668 are 2, 3, 139. Prime factorization of 1668 in exponential form is:

1668 = 2² × 3¹ × 139¹

Step-3: Factors of 1659

List of positive integer factors of 1659 that divides 1659 without a remainder.

1, 3, 7, 21, 79, 237, 553

Step-4: Factors of 1668

List of positive integer factors of 1668 that divides 1659 without a remainder.

1, 2, 3, 4, 6, 12, 139, 278, 417, 556, 834

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1659 and 1668. The biggest common factor number is the GCF number.
So the greatest common factor 1659 and 1668 is 3.

Also check out the Least Common Multiple of 1659 and 1668