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A positive integer is called terrific if it has exactly $10$ positive divisors. What is the smallest number of primes that could divide a terrific positive integer?

 Jun 22, 2024
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2^9    = 512  has  9 + 1 =     10 positive divisors

 

One prime - 2 -  divides it

 

cool cool cool

 Jun 22, 2024

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