1, 3, 5, 9, 15, 27, 45, 135.
135 is not prime. 135 = 3 * 3 * 3 * 5. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
Divisors are used to divide numbers.
2,4,8 (1 and 16 are divisors too, but the number and 1 are always divisors)
Sum of divisors = 91.
The divisors of 41231 are: 1, 41231.
12 has six divisors.
136 has eight divisors.
the divisors of 6 are: 1,2,3, and 6.
100,000 has 36 divisors.
84 has 12 divisors.
600 has 24 divisors.