What is the Greatest Common Factor of 81356 and 81370?

Greatest common factor (GCF) of 81356 and 81370 is 2.

GCF(81356,81370) = 2

We will now calculate the prime factors of 81356 and 81370, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81356 and 81370.

How to find the GCF of 81356 and 81370?

We will first find the prime factorization of 81356 and 81370. After we will calculate the factors of 81356 and 81370 and find the biggest common factor number .

Step-1: Prime Factorization of 81356

Prime factors of 81356 are 2, 11, 43. Prime factorization of 81356 in exponential form is:

81356 = 2² × 11¹ × 43²

Step-2: Prime Factorization of 81370

Prime factors of 81370 are 2, 5, 79, 103. Prime factorization of 81370 in exponential form is:

81370 = 2¹ × 5¹ × 79¹ × 103¹

Step-3: Factors of 81356

List of positive integer factors of 81356 that divides 81356 without a remainder.

1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1849, 1892, 3698, 7396, 20339, 40678

Step-4: Factors of 81370

List of positive integer factors of 81370 that divides 81356 without a remainder.

1, 2, 5, 10, 79, 103, 158, 206, 395, 515, 790, 1030, 8137, 16274, 40685

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81356 and 81370. The biggest common factor number is the GCF number.
So the greatest common factor 81356 and 81370 is 2.

Also check out the Least Common Multiple of 81356 and 81370