What is the Greatest Common Factor of 91890 and 91905?

Greatest common factor (GCF) of 91890 and 91905 is 15.

GCF(91890,91905) = 15

We will now calculate the prime factors of 91890 and 91905, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91890 and 91905.

How to find the GCF of 91890 and 91905?

We will first find the prime factorization of 91890 and 91905. After we will calculate the factors of 91890 and 91905 and find the biggest common factor number .

Step-1: Prime Factorization of 91890

Prime factors of 91890 are 2, 3, 5, 1021. Prime factorization of 91890 in exponential form is:

91890 = 2¹ × 3² × 5¹ × 1021¹

Step-2: Prime Factorization of 91905

Prime factors of 91905 are 3, 5, 11, 557. Prime factorization of 91905 in exponential form is:

91905 = 3¹ × 5¹ × 11¹ × 557¹

Step-3: Factors of 91890

List of positive integer factors of 91890 that divides 91890 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 1021, 2042, 3063, 5105, 6126, 9189, 10210, 15315, 18378, 30630, 45945

Step-4: Factors of 91905

List of positive integer factors of 91905 that divides 91890 without a remainder.

1, 3, 5, 11, 15, 33, 55, 165, 557, 1671, 2785, 6127, 8355, 18381, 30635

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91890 and 91905. The biggest common factor number is the GCF number.
So the greatest common factor 91890 and 91905 is 15.

Also check out the Least Common Multiple of 91890 and 91905