Is there any natural number having no factor at all?

(i) Is there any counting number having no factor at all ? (ii) Find all the numbers having exactly one factor. (iii) Find numbers between 1 and 100 having exactly three factors.

Is there are natural numbers which have no factor at all?

Is there any natural number that has no predecessor?

All natural numbers have minimum two factors

State with reason, "All natural numbers having at least one prime factor " is set or not ?

Factors of natural number 24.

Write any three natural numbers.