What is the Greatest Common Factor of 1685 and 1691?

Greatest common factor (GCF) of 1685 and 1691 is 1.

GCF(1685,1691) = 1

We will now calculate the prime factors of 1685 and 1691, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1685 and 1691.

How to find the GCF of 1685 and 1691?

We will first find the prime factorization of 1685 and 1691. After we will calculate the factors of 1685 and 1691 and find the biggest common factor number .

Step-1: Prime Factorization of 1685

Prime factors of 1685 are 5, 337. Prime factorization of 1685 in exponential form is:

1685 = 5¹ × 337¹

Step-2: Prime Factorization of 1691

Prime factors of 1691 are 19, 89. Prime factorization of 1691 in exponential form is:

1691 = 19¹ × 89¹

Step-3: Factors of 1685

List of positive integer factors of 1685 that divides 1685 without a remainder.

1, 5, 337

Step-4: Factors of 1691

List of positive integer factors of 1691 that divides 1685 without a remainder.

1, 19, 89

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1685 and 1691. The biggest common factor number is the GCF number.
So the greatest common factor 1685 and 1691 is 1.

Also check out the Least Common Multiple of 1685 and 1691