3.진약수의합

#include <iostream>
using namespace std;

int main() {
    int n, i, sum =1;
    cin>>n;
    cout<<"1";
    for(i=2; i<n; i++){
        if(n%i==0){
            cout<<" + " <<i;
            sum = sum+i;
        }
    }
    cout << " =  "<<sum;;
    return 0;
}