impo

#include <iostream>
#include <math.h>

using namespace std;

int main()
{
long long S=0,n,i;

cin>>n;
for (i=1;i<=sqrt(n);i++)
if (n%i==0)
{
S+=i;
if (n/i>i)
S+=n/i;
}
cout << S;
return 0;
}



#include <fstream>
using namespace std;

int main ()
{
    ifstream fin ("data.in");
    ofstream fout("data.out");

   int n1,n2,i,j,v[102],w[102],s[104],n,aux=0;

      fin>>n1;
      for (i=1;i<=n1;i++)
    fin>>v[i];

    fin>>n2;
    for (j=1;j<=n2;j++)
    fin>>w[j];

    n=(n1>n2)?n1:n2;

    i=n;
    while (i)
   {
       s[i]=v[i]+w[i]+aux;;
       aux=0;
       if (s[i]/10&&i!=1)
       {
           aux=1;
           s[i]%=10;

       }
       i--;
   }

    for (i=1;i<=n;i++)
        fout<<s[i];
    return 0;
}