What is the Greatest Common Factor of 1655 and 1670?

Greatest common factor (GCF) of 1655 and 1670 is 5.

GCF(1655,1670) = 5

We will now calculate the prime factors of 1655 and 1670, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1655 and 1670.

How to find the GCF of 1655 and 1670?

We will first find the prime factorization of 1655 and 1670. After we will calculate the factors of 1655 and 1670 and find the biggest common factor number .

Step-1: Prime Factorization of 1655

Prime factors of 1655 are 5, 331. Prime factorization of 1655 in exponential form is:

1655 = 5¹ × 331¹

Step-2: Prime Factorization of 1670

Prime factors of 1670 are 2, 5, 167. Prime factorization of 1670 in exponential form is:

1670 = 2¹ × 5¹ × 167¹

Step-3: Factors of 1655

List of positive integer factors of 1655 that divides 1655 without a remainder.

1, 5, 331

Step-4: Factors of 1670

List of positive integer factors of 1670 that divides 1655 without a remainder.

1, 2, 5, 10, 167, 334, 835

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1655 and 1670. The biggest common factor number is the GCF number.
So the greatest common factor 1655 and 1670 is 5.

Also check out the Least Common Multiple of 1655 and 1670