What is the Greatest Common Factor of 981 and 989?

Greatest common factor (GCF) of 981 and 989 is 1.

GCF(981,989) = 1

We will now calculate the prime factors of 981 and 989, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 981 and 989.

How to find the GCF of 981 and 989?

We will first find the prime factorization of 981 and 989. After we will calculate the factors of 981 and 989 and find the biggest common factor number .

Step-1: Prime Factorization of 981

Prime factors of 981 are 3, 109. Prime factorization of 981 in exponential form is:

981 = 3² × 109¹

Step-2: Prime Factorization of 989

Prime factors of 989 are 23, 43. Prime factorization of 989 in exponential form is:

989 = 23¹ × 43¹

Step-3: Factors of 981

List of positive integer factors of 981 that divides 981 without a remainder.

1, 3, 9, 109, 327

Step-4: Factors of 989

List of positive integer factors of 989 that divides 981 without a remainder.

1, 23, 43

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 981 and 989. The biggest common factor number is the GCF number.
So the greatest common factor 981 and 989 is 1.

Also check out the Least Common Multiple of 981 and 989