T1 - zad.4.

#include <iostream>
#include <cmath>

int main()
{
    int n, s=0;

    for(;;)
    {

        std:: cout << "Unesite prirodan broj n: ";
    for(;;)
    {
        std:: cin >> n;
        if(std:: cin) break;
        std:: cout << "Morate unijeti prirodan broj! ";
        std:: cin.clear();
        std:: cin.ignore(1000, '\n');
    }

    if(n==0) break;
    for(int i=1; i<=n; i++)
        {
            if(n%i==0)
             s+=i;
        }
        std:: cout << "Suma djelioca je: "<<s<< std:: endl;
        s=0;
    }
    return 0;
}