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A positive integer is called terrific if it has exactly $12$ positive divisors.  A positive integer is called fine if it has exactly 2 positive divisors.  Which numbers are fine?

 Jun 25, 2024
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A positive integer is called terrific if it has exactly $12$ positive divisors.  A positive integer is called fine if it has exactly 2 positive divisors.  Which numbers are fine?     

 

I can't figure out the question about "good" numbers,  

in fact, I'm not even certain I understood the question.  

But I think I can understand this one.  

 

Positive integers that happen to be Prime Numbers     

have exactly two positive divisors.  

.

 Jun 25, 2024

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