What is the Greatest Common Factor of 81945 and 81961?

Greatest common factor (GCF) of 81945 and 81961 is 1.

GCF(81945,81961) = 1

We will now calculate the prime factors of 81945 and 81961, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81945 and 81961.

How to find the GCF of 81945 and 81961?

We will first find the prime factorization of 81945 and 81961. After we will calculate the factors of 81945 and 81961 and find the biggest common factor number .

Step-1: Prime Factorization of 81945

Prime factors of 81945 are 3, 5, 607. Prime factorization of 81945 in exponential form is:

81945 = 3³ × 5¹ × 607¹

Step-2: Prime Factorization of 81961

Prime factors of 81961 are 11, 7451. Prime factorization of 81961 in exponential form is:

81961 = 11¹ × 7451¹

Step-3: Factors of 81945

List of positive integer factors of 81945 that divides 81945 without a remainder.

1, 3, 5, 9, 15, 27, 45, 135, 607, 1821, 3035, 5463, 9105, 16389, 27315

Step-4: Factors of 81961

List of positive integer factors of 81961 that divides 81945 without a remainder.

1, 11, 7451

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81945 and 81961. The biggest common factor number is the GCF number.
So the greatest common factor 81945 and 81961 is 1.

Also check out the Least Common Multiple of 81945 and 81961