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Cod sursa(job #831559)
#include <fstream>
using namespace std;
ifstream in ("sum.in");
ofstream out ("sum.out");
int v[200001];
int main()
{
int n,x,i,d=1,j,q;
long long s=0;
in>>n;
for(i=1;i<=n;i++)
{
in>>x;
for(q=1;q<=2*x;q++)
v[q]=q;
for(d=2;d<=x;d++)
if(x%d==0)
{
for(j=d;j<=2*x;j=j+d)
v[j]=0;
}
s=0;
for(q=1;q<=2*x;q++)
s=s+v[q];
out<<s<<"\n";
}
return 0;
}