What is the Greatest Common Factor of 81221 and 81240?

Greatest common factor (GCF) of 81221 and 81240 is 1.

GCF(81221,81240) = 1

We will now calculate the prime factors of 81221 and 81240, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81221 and 81240.

How to find the GCF of 81221 and 81240?

We will first find the prime factorization of 81221 and 81240. After we will calculate the factors of 81221 and 81240 and find the biggest common factor number .

Step-1: Prime Factorization of 81221

Prime factors of 81221 are 7, 41, 283. Prime factorization of 81221 in exponential form is:

81221 = 7¹ × 41¹ × 283¹

Step-2: Prime Factorization of 81240

Prime factors of 81240 are 2, 3, 5, 677. Prime factorization of 81240 in exponential form is:

81240 = 2³ × 3¹ × 5¹ × 677¹

Step-3: Factors of 81221

List of positive integer factors of 81221 that divides 81221 without a remainder.

1, 7, 41, 283, 287, 1981, 11603

Step-4: Factors of 81240

List of positive integer factors of 81240 that divides 81221 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 677, 1354, 2031, 2708, 3385, 4062, 5416, 6770, 8124, 10155, 13540, 16248, 20310, 27080, 40620

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81221 and 81240. The biggest common factor number is the GCF number.
So the greatest common factor 81221 and 81240 is 1.

Also check out the Least Common Multiple of 81221 and 81240