What is the Greatest Common Factor of 66420 and 66428?

Greatest common factor (GCF) of 66420 and 66428 is 4.

GCF(66420,66428) = 4

We will now calculate the prime factors of 66420 and 66428, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66420 and 66428.

How to find the GCF of 66420 and 66428?

We will first find the prime factorization of 66420 and 66428. After we will calculate the factors of 66420 and 66428 and find the biggest common factor number .

Step-1: Prime Factorization of 66420

Prime factors of 66420 are 2, 3, 5, 41. Prime factorization of 66420 in exponential form is:

66420 = 2² × 3⁴ × 5¹ × 41¹

Step-2: Prime Factorization of 66428

Prime factors of 66428 are 2, 16607. Prime factorization of 66428 in exponential form is:

66428 = 2² × 16607¹

Step-3: Factors of 66420

List of positive integer factors of 66420 that divides 66420 without a remainder.

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 41, 45, 54, 60, 81, 82, 90, 108, 123, 135, 162, 164, 180, 205, 246, 270, 324, 369, 405, 410, 492, 540, 615, 738, 810, 820, 1107, 1230, 1476, 1620, 1845, 2214, 2460, 3321, 3690, 4428, 5535, 6642, 7380, 11070, 13284, 16605, 22140, 33210

Step-4: Factors of 66428

List of positive integer factors of 66428 that divides 66420 without a remainder.

1, 2, 4, 16607, 33214

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66420 and 66428. The biggest common factor number is the GCF number.
So the greatest common factor 66420 and 66428 is 4.

Also check out the Least Common Multiple of 66420 and 66428