What is the Greatest Common Factor of 66640 and 66656?

Greatest common factor (GCF) of 66640 and 66656 is 16.

GCF(66640,66656) = 16

We will now calculate the prime factors of 66640 and 66656, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66640 and 66656.

How to find the GCF of 66640 and 66656?

We will first find the prime factorization of 66640 and 66656. After we will calculate the factors of 66640 and 66656 and find the biggest common factor number .

Step-1: Prime Factorization of 66640

Prime factors of 66640 are 2, 5, 7, 17. Prime factorization of 66640 in exponential form is:

66640 = 2⁴ × 5¹ × 7² × 17¹

Step-2: Prime Factorization of 66656

Prime factors of 66656 are 2, 2083. Prime factorization of 66656 in exponential form is:

66656 = 2⁵ × 2083¹

Step-3: Factors of 66640

List of positive integer factors of 66640 that divides 66640 without a remainder.

1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 80, 85, 98, 112, 119, 136, 140, 170, 196, 238, 245, 272, 280, 340, 392, 476, 490, 560, 595, 680, 784, 833, 952, 980, 1190, 1360, 1666, 1904, 1960, 2380, 3332, 3920, 4165, 4760, 6664, 8330, 9520, 13328, 16660, 33320

Step-4: Factors of 66656

List of positive integer factors of 66656 that divides 66640 without a remainder.

1, 2, 4, 8, 16, 32, 2083, 4166, 8332, 16664, 33328

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66640 and 66656. The biggest common factor number is the GCF number.
So the greatest common factor 66640 and 66656 is 16.

Also check out the Least Common Multiple of 66640 and 66656