#include <bits/stdc++.h>
#define IO ios::sync_with_stdio(false);cin.tie(0);
#define debug(x) cerr << #x << " = " << (x) << ' '
#define bug(x) cerr << (x) << ' '
#define endl cerr << '\n'
#define all(v) (v).begin(), (v).end()
#define SZ(v) (ll)(v).size()
#define lowbit(x) (x)&-(x)
#define pb emplace_back
#define F first
#define S second
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
//#define TEST
int sum = 0;
set<int> st;
inline void dfs(int x, int lim)
{
int m = sqrt(x);
for (int i=lim; i <= m; ++i)
{
if (x / i < lim) break;
if (x % i) continue;
sum += i - 1;
dfs(x / i, i);
sum -= i - 1;
}
st.insert(sum + x - 1);
}
int main(void)
{ IO
int n, i;
cin >> n;
int m = sqrt(n);
for (i=2; i <= m; ++i)
{
if (n % i) continue;
sum = i - 1;
dfs(n / i, i);
}
st.insert(n - 1);
cout << SZ(st) << '\n';
for (int x : st) cout << x << ' ';
cout << '\n';
return 0;
}
