$$x$$ and $$y$$ are two least positive integers which satisfy the following conditions: The product of $$42$$ and $$x$$ equals to the square of $$42$$. Factoring the product of $$42$$ and $$y$$, all factors\textquotesingle{} exponents equal to $$1$$. So what is the sum of $$x$$ and $$y$$? 
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