There are only four factors ! They are 1,2,13 & 26
26, 36, 39, 52 and 78 are all factors of 468.
26, 52, 78, 104, 130
81 only has five factors.
The first five multiples of 13: 13, 26, 39, 52, 65
Nine has three factors.
They are the first 26 numbers, starting with 2, such that their only factors are 1 and the numbers themselves.
There are 26 possibilities.
One and two
59 is a prime number and therefore does not have any factors.
First Five Years - 2014 was released on: USA: 26 April 2014
The factors of 26 are 1, 2, 13, and 26.
The factors of 81 are 1, 3, 9, 27, and 81