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Cod sursa(job #350252)
#include <fstream>
using namespace std;
const int maxx=(1<<17);
ifstream in("sum.in");
ofstream out("sum.out");
int main()
{
int n,i,j,a[maxx],e[maxx];
in>>n;
for(i=0;i<n;i++){
in>>a[i];
}
for(i=1;i<maxx;i++){
e[i]=i;
}
for(i=2;i<maxx;i++){
if(e[i]==i){
for(j=i;j<maxx;j+=i){
e[j]=e[j]/i*(i-1);
}
}
}
for(i=0;i<n;i++){
out<<(long long)e[a[i]]*2*a[i]<<"\n";
}
return 0;
}