2
A number has exactly three factors if and only if it is the square of a prime number.
2 is an even number with only 2 factors.
a prime number
A number that has exactly two (positive) factors is called a prime number. For instance, the only factors of 7 are 1 and 7.
A prime number.
A prime number has exactly two factors: itself and 1.
2 is the only positive even number with only 2 positive integer factors. (1 and 2 are the factors. )
Prime. The only factors of a prime number are 1 and the number.
Any prime number has exactly two factors, 1 and the number itself.
There are an infinite number of integers with "only 7 factors". Any number which is the product of exactly 7 prime numbers.
1 is the only number that has exactly one factor. A prime number has exactly two factors, 1 and the number itself. A composite number has more than two factors.
a # that has exactly 2 factors is called a prime number, an example of a prime number is 17 because it is odd and it only has 2 factors, 17= 1 and itself