What is the Greatest Common Factor of 1665 and 1671?

Greatest common factor (GCF) of 1665 and 1671 is 3.

GCF(1665,1671) = 3

We will now calculate the prime factors of 1665 and 1671, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1665 and 1671.

How to find the GCF of 1665 and 1671?

We will first find the prime factorization of 1665 and 1671. After we will calculate the factors of 1665 and 1671 and find the biggest common factor number .

Step-1: Prime Factorization of 1665

Prime factors of 1665 are 3, 5, 37. Prime factorization of 1665 in exponential form is:

1665 = 3² × 5¹ × 37¹

Step-2: Prime Factorization of 1671

Prime factors of 1671 are 3, 557. Prime factorization of 1671 in exponential form is:

1671 = 3¹ × 557¹

Step-3: Factors of 1665

List of positive integer factors of 1665 that divides 1665 without a remainder.

1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555

Step-4: Factors of 1671

List of positive integer factors of 1671 that divides 1665 without a remainder.

1, 3, 557

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1665 and 1671. The biggest common factor number is the GCF number.
So the greatest common factor 1665 and 1671 is 3.

Also check out the Least Common Multiple of 1665 and 1671