What is the Greatest Common Factor of 1690 and 1709?

Greatest common factor (GCF) of 1690 and 1709 is 1.

GCF(1690,1709) = 1

We will now calculate the prime factors of 1690 and 1709, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1690 and 1709.

How to find the GCF of 1690 and 1709?

We will first find the prime factorization of 1690 and 1709. After we will calculate the factors of 1690 and 1709 and find the biggest common factor number .

Step-1: Prime Factorization of 1690

Prime factors of 1690 are 2, 5, 13. Prime factorization of 1690 in exponential form is:

1690 = 2¹ × 5¹ × 13²

Step-2: Prime Factorization of 1709

Prime factors of 1709 are 1709. Prime factorization of 1709 in exponential form is:

1709 = 1709¹

Step-3: Factors of 1690

List of positive integer factors of 1690 that divides 1690 without a remainder.

1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845

Step-4: Factors of 1709

List of positive integer factors of 1709 that divides 1690 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1690 and 1709. The biggest common factor number is the GCF number.
So the greatest common factor 1690 and 1709 is 1.

Also check out the Least Common Multiple of 1690 and 1709