What is the Greatest Common Factor of 18009 and 18018?

Greatest common factor (GCF) of 18009 and 18018 is 9.

GCF(18009,18018) = 9

We will now calculate the prime factors of 18009 and 18018, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18009 and 18018.

How to find the GCF of 18009 and 18018?

We will first find the prime factorization of 18009 and 18018. After we will calculate the factors of 18009 and 18018 and find the biggest common factor number .

Step-1: Prime Factorization of 18009

Prime factors of 18009 are 3, 23, 29. Prime factorization of 18009 in exponential form is:

18009 = 3³ × 23¹ × 29¹

Step-2: Prime Factorization of 18018

Prime factors of 18018 are 2, 3, 7, 11, 13. Prime factorization of 18018 in exponential form is:

18018 = 2¹ × 3² × 7¹ × 11¹ × 13¹

Step-3: Factors of 18009

List of positive integer factors of 18009 that divides 18009 without a remainder.

1, 3, 9, 23, 27, 29, 69, 87, 207, 261, 621, 667, 783, 2001, 6003

Step-4: Factors of 18018

List of positive integer factors of 18018 that divides 18009 without a remainder.

1, 2, 3, 6, 7, 9, 11, 13, 14, 18, 21, 22, 26, 33, 39, 42, 63, 66, 77, 78, 91, 99, 117, 126, 143, 154, 182, 198, 231, 234, 273, 286, 429, 462, 546, 693, 819, 858, 1001, 1287, 1386, 1638, 2002, 2574, 3003, 6006, 9009

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18009 and 18018. The biggest common factor number is the GCF number.
So the greatest common factor 18009 and 18018 is 9.

Also check out the Least Common Multiple of 18009 and 18018