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Cod sursa(job #858967)
#include <iostream>
#include <fstream>
#define N 100001
using namespace std;
int x,n,i,j,v[N];
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
scanf("%d",&n);
for(i=2;i<N;i++)
v[i]=i;
for(i=2;i<N;i++)
if(v[i]==i)
for(j=i;j<N;j+=i)
v[j]=v[j]/i*(i-1);
for(i=1;i<=n;i++)
{
scanf("%d",&x);
printf("%lld\n",(long long)v[x]*2*x);
}
return 0;
}