What is the Greatest Common Factor of 91981 and 91989?

Greatest common factor (GCF) of 91981 and 91989 is 1.

GCF(91981,91989) = 1

We will now calculate the prime factors of 91981 and 91989, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91981 and 91989.

How to find the GCF of 91981 and 91989?

We will first find the prime factorization of 91981 and 91989. After we will calculate the factors of 91981 and 91989 and find the biggest common factor number .

Step-1: Prime Factorization of 91981

Prime factors of 91981 are 59, 1559. Prime factorization of 91981 in exponential form is:

91981 = 59¹ × 1559¹

Step-2: Prime Factorization of 91989

Prime factors of 91989 are 3, 3407. Prime factorization of 91989 in exponential form is:

91989 = 3³ × 3407¹

Step-3: Factors of 91981

List of positive integer factors of 91981 that divides 91981 without a remainder.

1, 59, 1559

Step-4: Factors of 91989

List of positive integer factors of 91989 that divides 91981 without a remainder.

1, 3, 9, 27, 3407, 10221, 30663

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91981 and 91989. The biggest common factor number is the GCF number.
So the greatest common factor 91981 and 91989 is 1.

Also check out the Least Common Multiple of 91981 and 91989