What is the Greatest Common Factor of 81908 and 81918?

Greatest common factor (GCF) of 81908 and 81918 is 2.

GCF(81908,81918) = 2

We will now calculate the prime factors of 81908 and 81918, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81908 and 81918.

How to find the GCF of 81908 and 81918?

We will first find the prime factorization of 81908 and 81918. After we will calculate the factors of 81908 and 81918 and find the biggest common factor number .

Step-1: Prime Factorization of 81908

Prime factors of 81908 are 2, 20477. Prime factorization of 81908 in exponential form is:

81908 = 2² × 20477¹

Step-2: Prime Factorization of 81918

Prime factors of 81918 are 2, 3, 37, 41. Prime factorization of 81918 in exponential form is:

81918 = 2¹ × 3³ × 37¹ × 41¹

Step-3: Factors of 81908

List of positive integer factors of 81908 that divides 81908 without a remainder.

1, 2, 4, 20477, 40954

Step-4: Factors of 81918

List of positive integer factors of 81918 that divides 81908 without a remainder.

1, 2, 3, 6, 9, 18, 27, 37, 41, 54, 74, 82, 111, 123, 222, 246, 333, 369, 666, 738, 999, 1107, 1517, 1998, 2214, 3034, 4551, 9102, 13653, 27306, 40959

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81908 and 81918. The biggest common factor number is the GCF number.
So the greatest common factor 81908 and 81918 is 2.

Also check out the Least Common Multiple of 81908 and 81918