What is the Greatest Common Factor of 16985 and 16990?

Greatest common factor (GCF) of 16985 and 16990 is 5.

GCF(16985,16990) = 5

We will now calculate the prime factors of 16985 and 16990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16985 and 16990.

How to find the GCF of 16985 and 16990?

We will first find the prime factorization of 16985 and 16990. After we will calculate the factors of 16985 and 16990 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 16990

Prime factors of 16990 are 2, 5, 1699. Prime factorization of 16990 in exponential form is:

16990 = 2¹ × 5¹ × 1699¹

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 16990

List of positive integer factors of 16990 that divides 16985 without a remainder.

1, 2, 5, 10, 1699, 3398, 8495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16985 and 16990. The biggest common factor number is the GCF number.
So the greatest common factor 16985 and 16990 is 5.

Also check out the Least Common Multiple of 16985 and 16990