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
59 is a prime number and therefore does not have any factors.
The first five abundant numbers are 12, 18, 20, 24, and 30.
18, 36, 54, 72, 90.
18 only has six factors.
The factors of 81 are 1, 3, 9, 27, and 81
18 and all factors of 18. 18 and all factors of 18. 18 and all factors of 18. 18 and all factors of 18.