What is the Greatest Common Factor of 1686 and 1690?

Greatest common factor (GCF) of 1686 and 1690 is 2.

GCF(1686,1690) = 2

We will now calculate the prime factors of 1686 and 1690, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1686 and 1690.

How to find the GCF of 1686 and 1690?

We will first find the prime factorization of 1686 and 1690. After we will calculate the factors of 1686 and 1690 and find the biggest common factor number .

Step-1: Prime Factorization of 1686

Prime factors of 1686 are 2, 3, 281. Prime factorization of 1686 in exponential form is:

1686 = 2¹ × 3¹ × 281¹

Step-2: 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-3: Factors of 1686

List of positive integer factors of 1686 that divides 1686 without a remainder.

1, 2, 3, 6, 281, 562, 843

Step-4: Factors of 1690

List of positive integer factors of 1690 that divides 1686 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1686 and 1690. The biggest common factor number is the GCF number.
So the greatest common factor 1686 and 1690 is 2.

Also check out the Least Common Multiple of 1686 and 1690