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Cod sursa(job #40943)
#include <fstream.h>
inline long int cmmdc(int a,int b){
int c; if(a<b){c=a;a=b;b=c;}
do{c=a%b;a=b;b=c;}while(c);return a;
}
int main(){
ifstream f("sum.in");
ofstream g("sum.out");
long int x,s,i,n,j;
f>>n;
for(j=1; j<=n; j++){f>>x;s=0;
for(i=1; i<=2*x; i++)if(cmmdc(x,i)==1)s+=i;
g<<s<<'\n';}
}