What is the Greatest Common Factor of 91970 and 91978?

Greatest common factor (GCF) of 91970 and 91978 is 2.

GCF(91970,91978) = 2

We will now calculate the prime factors of 91970 and 91978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 91970 and 91978.

How to find the GCF of 91970 and 91978?

We will first find the prime factorization of 91970 and 91978. After we will calculate the factors of 91970 and 91978 and find the biggest common factor number .

Step-1: Prime Factorization of 91970

Prime factors of 91970 are 2, 5, 17, 541. Prime factorization of 91970 in exponential form is:

91970 = 2¹ × 5¹ × 17¹ × 541¹

Step-2: Prime Factorization of 91978

Prime factors of 91978 are 2, 45989. Prime factorization of 91978 in exponential form is:

91978 = 2¹ × 45989¹

Step-3: Factors of 91970

List of positive integer factors of 91970 that divides 91970 without a remainder.

1, 2, 5, 10, 17, 34, 85, 170, 541, 1082, 2705, 5410, 9197, 18394, 45985

Step-4: Factors of 91978

List of positive integer factors of 91978 that divides 91970 without a remainder.

1, 2, 45989

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 91970 and 91978. The biggest common factor number is the GCF number.
So the greatest common factor 91970 and 91978 is 2.

Also check out the Least Common Multiple of 91970 and 91978