What is the Greatest Common Factor of 16985 and 16991?

Greatest common factor (GCF) of 16985 and 16991 is 1.

GCF(16985,16991) = 1

We will now calculate the prime factors of 16985 and 16991, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16985 and 16991.

How to find the GCF of 16985 and 16991?

We will first find the prime factorization of 16985 and 16991. After we will calculate the factors of 16985 and 16991 and find the biggest common factor number .

Step-1: Prime Factorization of 16985

Prime factors of 16985 are 5, 43, 79. Prime factorization of 16985 in exponential form is:

16985 = 5¹ × 43¹ × 79¹

Step-2: Prime Factorization of 16991

Prime factors of 16991 are 13, 1307. Prime factorization of 16991 in exponential form is:

16991 = 13¹ × 1307¹

Step-3: Factors of 16985

List of positive integer factors of 16985 that divides 16985 without a remainder.

1, 5, 43, 79, 215, 395, 3397

Step-4: Factors of 16991

List of positive integer factors of 16991 that divides 16985 without a remainder.

1, 13, 1307

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16985 and 16991. The biggest common factor number is the GCF number.
So the greatest common factor 16985 and 16991 is 1.

Also check out the Least Common Multiple of 16985 and 16991