The way to be sure you have one of these is to take any three distinct prime numbers and multiply them. Those three prime numbers are then the only factors the product can have. An example is the number 30, which has factors of 2, 3 and 5.
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The number 9: factors are 9, 3, and 1.
6. Factors are 1, 2, 3, and 6.
Oh, dude, the least number with exactly 8 factors is 24. It's like, got factors 1, 2, 3, 4, 6, 8, 12, and 24. So, yeah, that's the magic number with just the right amount of factors to make it cool.
A prime number is a whole number with exactly two factors: 1 and itself.
30 has exactly 8 factors 1,2,3,5,6,10,15,30