they are called numbers with 3 factors
None because prime numbers have only two factors
Because there are only four numbers that divide into those numbers evenly.
Factors don't have numbers. Numbers have factors. Numbers that have the factors 2, 4 and 8 are 8 and all of its multiples.
There are square numbers (numbers which are a square of an integer), such as 4. It's factors, listed are 1, 2, and 4. All square numbers have an odd number of factors. Then there's 1, which has only 1 factor: 1. All other numbers have an even number of factors. Prime numbers will have only 2 factors (2 is even).
Numbers having only 2 factors are prime numbers. Their only factors are 1 and themselves. Prime numbers. The only two factors should be 1 and itself.
1 has only 1 factor (1) 2 has only 2 factors (1 and 2) 3 has only 2 factors (1 and 3) 4 has only 3 factors (1, 2, and 4) 6 has 4 factors (1, 2, 3, and 6) 8 has 4 factors (1, 2, 4, and 8)
Prime numbers only have one and itself as factors.
Numbers that have only 2 factors are prime numbers
Prime numbers have only two factors, 1 and themselves, so only prime numbers could have only two factors
They are 5, 7 and 11 which are all prime numbers
What two numbers have the factors 2 4 and 8