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Cod sursa(job #329382)
#include<iostream.h>
#include<stdio.h>
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
long long n,x,i,j,s=0,k,i1,d=0,v[100000],t=1;
char a[200001];
v[0]=0;
scanf("%lld\n",&n);
for(i=1;i<=50000;i++)
a[i]='1';
a[1]='0';
for(i=1;i<=50000;i++)
{
if(a[i]=='1')
{
d++;
v[d]=i;
for(j=i+i;j<=50000;j+=i)
a[j]='0';
}
}
for(i=1;i<=n;i++)
{
scanf("%lld\n",&x);
for(i1=1;i1<=2*x;i1++)
a[i1]='0';
t=1;
s=0;
for(i1=1;i1<=d&&t;i1++)
{
if(v[i1+1]>x)t=0;
if(x%v[i1]==0)
{
for(k=v[i1];k<=2*x;k+=v[i1])
{
if(a[k]!='1')
{s+=k;
a[k]='1';}
}
}
}
s=2*x*(2*x+1)/2-s;
printf("%lld\n",s);
}
return 0;
}