What is the Greatest Common Factor of 15985 and 15989?

Greatest common factor (GCF) of 15985 and 15989 is 1.

GCF(15985,15989) = 1

We will now calculate the prime factors of 15985 and 15989, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15985 and 15989.

How to find the GCF of 15985 and 15989?

We will first find the prime factorization of 15985 and 15989. After we will calculate the factors of 15985 and 15989 and find the biggest common factor number .

Step-1: Prime Factorization of 15985

Prime factors of 15985 are 5, 23, 139. Prime factorization of 15985 in exponential form is:

15985 = 5¹ × 23¹ × 139¹

Step-2: Prime Factorization of 15989

Prime factors of 15989 are 59, 271. Prime factorization of 15989 in exponential form is:

15989 = 59¹ × 271¹

Step-3: Factors of 15985

List of positive integer factors of 15985 that divides 15985 without a remainder.

1, 5, 23, 115, 139, 695, 3197

Step-4: Factors of 15989

List of positive integer factors of 15989 that divides 15985 without a remainder.

1, 59, 271

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15985 and 15989. The biggest common factor number is the GCF number.
So the greatest common factor 15985 and 15989 is 1.

Also check out the Least Common Multiple of 15985 and 15989