What is the Greatest Common Factor of 81678 and 81686?

Greatest common factor (GCF) of 81678 and 81686 is 2.

GCF(81678,81686) = 2

We will now calculate the prime factors of 81678 and 81686, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81678 and 81686.

How to find the GCF of 81678 and 81686?

We will first find the prime factorization of 81678 and 81686. After we will calculate the factors of 81678 and 81686 and find the biggest common factor number .

Step-1: Prime Factorization of 81678

Prime factors of 81678 are 2, 3, 13613. Prime factorization of 81678 in exponential form is:

81678 = 2¹ × 3¹ × 13613¹

Step-2: Prime Factorization of 81686

Prime factors of 81686 are 2, 11, 47, 79. Prime factorization of 81686 in exponential form is:

81686 = 2¹ × 11¹ × 47¹ × 79¹

Step-3: Factors of 81678

List of positive integer factors of 81678 that divides 81678 without a remainder.

1, 2, 3, 6, 13613, 27226, 40839

Step-4: Factors of 81686

List of positive integer factors of 81686 that divides 81678 without a remainder.

1, 2, 11, 22, 47, 79, 94, 158, 517, 869, 1034, 1738, 3713, 7426, 40843

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81678 and 81686. The biggest common factor number is the GCF number.
So the greatest common factor 81678 and 81686 is 2.

Also check out the Least Common Multiple of 81678 and 81686