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The number $100$ has four perfect square divisors, namely $1,$ $4,$ $25,$ and $100.$
What is the smallest positive integer that has exactly $2$ perfect square divisors?

 Oct 18, 2024
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The number $100$ has four perfect square divisors, namely $1,$ $4,$ $25,$ and $100.$     
What is the smallest positive integer that has exactly $2$ perfect square divisors?    

 

That would be four ... it has two perfect square divisors, namely one and four.    

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 Oct 18, 2024

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