Just 1. Nothing else.
The factors of all of the numbers from 1 to 100 are all of the numbers from 1 to 50.
All the factors are 1.
1, 3, 43, 129 those are all the factors 1, 3, 43, 129 those are all the factors
The factors of all the numbers 1 through 30 include all the numbers 1 through 30.
They are 1 and 17 because 17 is a prime number which has only two factors
The factors of 9 are 1, 3, and 9
all the factors of 77 are: 1, 7, 11, 77
There are 25 prime numbers between 1 and 100, all of them can be factors.
The factors of 223 are: 1, 223
1 and 83 are the factors of 83.
The factors of 89 are 1 and 89
The factors of 31 are: 1, 31