Answer 1

Assuming the number in question is x, any integer number in the range of 2 to the square root of x may NOT be a divisor of x.

Answer 2

I have a Python code for that :)

https://code.sololearn.com/cCG0NiHxo8l3/?ref=app

Answer 3

This is the code I wrote using the condition already suggested by Kuba, I used only prime numbers as divisor of x, because if a number is divided by a non-prime number P, is also divided by the prime numbers that divide P

https://code.sololearn.com/cn1cz2EdhtBP/?ref=app

Answer 4

Give me the c# or ruby code

Answer 5

I don't know c# and ruby jet