What is the Greatest Common Factor of 81221 and 81228?

Greatest common factor (GCF) of 81221 and 81228 is 7.

GCF(81221,81228) = 7

We will now calculate the prime factors of 81221 and 81228, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81221 and 81228.

How to find the GCF of 81221 and 81228?

We will first find the prime factorization of 81221 and 81228. After we will calculate the factors of 81221 and 81228 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 81228

Prime factors of 81228 are 2, 3, 7, 967. Prime factorization of 81228 in exponential form is:

81228 = 2² × 3¹ × 7¹ × 967¹

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 81228

List of positive integer factors of 81228 that divides 81221 without a remainder.

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 967, 1934, 2901, 3868, 5802, 6769, 11604, 13538, 20307, 27076, 40614

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81221 and 81228. The biggest common factor number is the GCF number.
So the greatest common factor 81221 and 81228 is 7.

Also check out the Least Common Multiple of 81221 and 81228