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纯粹是数学题目高了高中的数学公式!#include <stdio.h>
int main()
{
__int64 a,m,n;
scanf("%I64d",&a);
for(m=a;m>=1;m--)
if((a*a+1)%m==0)
break;
n=(a*a+1)/m;
printf("%I64d\n",2*a+m+n);
return 1;
}
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