What are numbers that have 2 4 8 factors?

Answer 1

Numbers that have 2 factors are prime numbers;

Numbers that have 4 factors are either:

* the cube of a prime; or

* the product of two different primes;

Numbers that have 8 factors are either:

* a prime to the power 7;

* the product of a prime cubed and different prime;

* the product of three different primes.