What is the Greatest Common Factor of 81646 and 81664?

Greatest common factor (GCF) of 81646 and 81664 is 2.

GCF(81646,81664) = 2

We will now calculate the prime factors of 81646 and 81664, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81646 and 81664.

How to find the GCF of 81646 and 81664?

We will first find the prime factorization of 81646 and 81664. After we will calculate the factors of 81646 and 81664 and find the biggest common factor number .

Step-1: Prime Factorization of 81646

Prime factors of 81646 are 2, 40823. Prime factorization of 81646 in exponential form is:

81646 = 2¹ × 40823¹

Step-2: Prime Factorization of 81664

Prime factors of 81664 are 2, 11, 29. Prime factorization of 81664 in exponential form is:

81664 = 2⁸ × 11¹ × 29¹

Step-3: Factors of 81646

List of positive integer factors of 81646 that divides 81646 without a remainder.

1, 2, 40823

Step-4: Factors of 81664

List of positive integer factors of 81664 that divides 81646 without a remainder.

1, 2, 4, 8, 11, 16, 22, 29, 32, 44, 58, 64, 88, 116, 128, 176, 232, 256, 319, 352, 464, 638, 704, 928, 1276, 1408, 1856, 2552, 2816, 3712, 5104, 7424, 10208, 20416, 40832

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81646 and 81664. The biggest common factor number is the GCF number.
So the greatest common factor 81646 and 81664 is 2.

Also check out the Least Common Multiple of 81646 and 81664