What is the Greatest Common Factor of 91980 and 91991?

Greatest common factor (GCF) of 91980 and 91991 is 1.

GCF(91980,91991) = 1

We will now calculate the prime factors of 91980 and 91991, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91980 and 91991.

How to find the GCF of 91980 and 91991?

We will first find the prime factorization of 91980 and 91991. After we will calculate the factors of 91980 and 91991 and find the biggest common factor number .

Step-1: Prime Factorization of 91980

Prime factors of 91980 are 2, 3, 5, 7, 73. Prime factorization of 91980 in exponential form is:

91980 = 2² × 3² × 5¹ × 7¹ × 73¹

Step-2: Prime Factorization of 91991

Prime factors of 91991 are 67, 1373. Prime factorization of 91991 in exponential form is:

91991 = 67¹ × 1373¹

Step-3: Factors of 91980

List of positive integer factors of 91980 that divides 91980 without a remainder.

1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 73, 84, 90, 105, 126, 140, 146, 180, 210, 219, 252, 292, 315, 365, 420, 438, 511, 630, 657, 730, 876, 1022, 1095, 1260, 1314, 1460, 1533, 2044, 2190, 2555, 2628, 3066, 3285, 4380, 4599, 5110, 6132, 6570, 7665, 9198, 10220, 13140, 15330, 18396, 22995, 30660, 45990

Step-4: Factors of 91991

List of positive integer factors of 91991 that divides 91980 without a remainder.

1, 67, 1373

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91980 and 91991. The biggest common factor number is the GCF number.
So the greatest common factor 91980 and 91991 is 1.

Also check out the Least Common Multiple of 91980 and 91991