#include <iostream>
#include <string>
//#include <conio.h>
#include <algorithm>
//#include <cassert>
//#include<stack>
#include <cmath>
#include<vector>
 
#define ll long long 
 
using namespace std;
 
 
int main()
{
 
    int number;
    cin >> number;
 
    vector<int> res;
 
    for (size_t i = 1; i <= number / 2 ; i++)
    {
        if (number % i == 0)
        {
            res.push_back(i);
        }
    }
 
    res.push_back(number);
 
    cout << res.size() << endl;
 
    sort(res.begin(), res.end());
 
    for (size_t i = 0; i < res.size(); i++)
    {
        cout << res[i] << " ";
    }
 
 
    return 0;
 
}

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