If you were to take 18 and divide it by one of its factors, the answer would be another factor of 18.
How Can I Do It Myself? When we counted the Factors of 36 that we listed above, we found that 36 has 9 Positive Factors and 9 Negative Factors.
The list of Negative Factors of 36 are: -1, -2, -3, -4, -6, -9, -12, -18, and -36.
How to find the Factors of 24 Since the Factors of 24 are all the numbers that you can evenly divide into 24, we simply need to divide 24 by all numbers up to 24 to see which ones result in an even quotient.
It works on numbers up to 4,294,967,295.
Therefore, the greatest common factor of 18 and 24 is 6.