1, 2, 3, 6, 9
1, 2, 3, 6, 9, 18 are the first and only 6 factors of 18
The factors of 18 are 1,2,3,6,9 and 18. For them to be common, they need to be compared to another set of factors.
81 only has five factors.
Nine has three factors.
There are only four factors ! They are 1,2,13 & 26
they are 36,54,72,90 and 108
The first five abundant numbers are 12, 18, 20, 24, and 30.
18, 36, 54, 72, 90.
59 is a prime number and therefore does not have any factors.
18 only has six factors.
The first five nonzero multiples of 6 are 6, 12, 18, 24 and 30.
The factors of 81 are 1, 3, 9, 27, and 81