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Cod sursa(job #558020)
#include<fstream>
using namespace std;
ifstream fin("sum.in");ofstream fout("sum.out");
long long int i,j,s,N,x,l,v[100005],k,m;
int main(){
fin>>N;
for(i=1;i<=N;++i){
fin>>x;
s=(2*x-1)*(2*x)/2;
for(m=1;m<=2*x-1;m++)
v[m]=m;
for(k=2;k<=x;++k){
if(x%k==0){
for(l=k;l<=2*x-1;l+=k){
s-=v[l];v[l]=0;
}
}
}
fout<<s<<endl;
}
return 0;
}