What is the Greatest Common Factor of 81975 and 81987?

Greatest common factor (GCF) of 81975 and 81987 is 3.

GCF(81975,81987) = 3

We will now calculate the prime factors of 81975 and 81987, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81975 and 81987.

How to find the GCF of 81975 and 81987?

We will first find the prime factorization of 81975 and 81987. After we will calculate the factors of 81975 and 81987 and find the biggest common factor number .

Step-1: Prime Factorization of 81975

Prime factors of 81975 are 3, 5, 1093. Prime factorization of 81975 in exponential form is:

81975 = 3¹ × 5² × 1093¹

Step-2: Prime Factorization of 81987

Prime factors of 81987 are 3, 27329. Prime factorization of 81987 in exponential form is:

81987 = 3¹ × 27329¹

Step-3: Factors of 81975

List of positive integer factors of 81975 that divides 81975 without a remainder.

1, 3, 5, 15, 25, 75, 1093, 3279, 5465, 16395, 27325

Step-4: Factors of 81987

List of positive integer factors of 81987 that divides 81975 without a remainder.

1, 3, 27329

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81975 and 81987. The biggest common factor number is the GCF number.
So the greatest common factor 81975 and 81987 is 3.

Also check out the Least Common Multiple of 81975 and 81987