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Cod sursa(job #304256)
#include<stdio.h>
#define N 100001
long n,v[N],x;
void euler()
{
int i,j;
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 );
}
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
scanf("%ld",&n);
euler();
for (int i=1; i<=n; i++)
{
scanf("%ld", &x);
x=2*v[x]*x;
printf ("%ld\n",x);
}
euler();
return 0;
}