The answer depends on what the numbers have more of when 3 factors!
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they are called numbers with 3 factors
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.
they are prime numbers. number that only have two factors, 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)
All numbers that are the square of primes have exactly 3 factors.