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def j(s:Int)=Math.sqrt((1 to s).filter(s%_<1).map(a⇒a*aa=>a*a).sum)%1==0
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def j(s:Int)=Math.sqrt((1 to s).filter(s%_<1).map(a⇒a*a).sum)%1==0
Try it online!
def j(s:Int)=Math.sqrt((1 to s).filter(s%_<1).map(a=>a*a).sum)%1==0
