What is the Greatest Common Factor of 81243 and 81255?

Greatest common factor (GCF) of 81243 and 81255 is 3.

GCF(81243,81255) = 3

We will now calculate the prime factors of 81243 and 81255, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81243 and 81255.

How to find the GCF of 81243 and 81255?

We will first find the prime factorization of 81243 and 81255. After we will calculate the factors of 81243 and 81255 and find the biggest common factor number .

Step-1: Prime Factorization of 81243

Prime factors of 81243 are 3, 17, 59. Prime factorization of 81243 in exponential form is:

81243 = 3⁴ × 17¹ × 59¹

Step-2: Prime Factorization of 81255

Prime factors of 81255 are 3, 5, 5417. Prime factorization of 81255 in exponential form is:

81255 = 3¹ × 5¹ × 5417¹

Step-3: Factors of 81243

List of positive integer factors of 81243 that divides 81243 without a remainder.

1, 3, 9, 17, 27, 51, 59, 81, 153, 177, 459, 531, 1003, 1377, 1593, 3009, 4779, 9027, 27081

Step-4: Factors of 81255

List of positive integer factors of 81255 that divides 81243 without a remainder.

1, 3, 5, 15, 5417, 16251, 27085

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81243 and 81255. The biggest common factor number is the GCF number.
So the greatest common factor 81243 and 81255 is 3.

Also check out the Least Common Multiple of 81243 and 81255