What is the Greatest Common Factor of 66409 and 66420?

Greatest common factor (GCF) of 66409 and 66420 is 1.

GCF(66409,66420) = 1

We will now calculate the prime factors of 66409 and 66420, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66409 and 66420.

How to find the GCF of 66409 and 66420?

We will first find the prime factorization of 66409 and 66420. After we will calculate the factors of 66409 and 66420 and find the biggest common factor number .

Step-1: Prime Factorization of 66409

Prime factors of 66409 are 7, 53, 179. Prime factorization of 66409 in exponential form is:

66409 = 7¹ × 53¹ × 179¹

Step-2: 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-3: Factors of 66409

List of positive integer factors of 66409 that divides 66409 without a remainder.

1, 7, 53, 179, 371, 1253, 9487

Step-4: Factors of 66420

List of positive integer factors of 66420 that divides 66409 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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66409 and 66420. The biggest common factor number is the GCF number.
So the greatest common factor 66409 and 66420 is 1.

Also check out the Least Common Multiple of 66409 and 66420