8, 2*2*2
The smallest number that has exactly three factors is 4.
4? the factors of 4 are 1,4 and 2
I belive it is 4. The factors of 4 are 1,4, and 2.
4, 9 and 25.
A number has exactly three factors if and only if it is the square of a prime number.
A square of any prime number, p has exactly three factors. They are 1, p and p^2.
The number 9: factors are 9, 3, and 1.
the four smallest numbers are 4, 9, 25 and 49.
All prime squares have exactly three factors.49 has exactly three factors: 1, 7, and 49.
If by "least number" you mean "smallest positive integer", then the answer is the product of the three smallest primes: 2x3x5 = 30
101 is the first three-digit prime number.
There are an infinite number of them. 8 has three prime factors, 30 is the first with three distinct prime factors.