#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("unroll-loops")
using namespace std;
using namespace __gnu_pbds;
using ll = long long;
#define pb push_back
#define fi first
#define si second
#define ar array
typedef pair<int,int> pi;
typedef tuple<int,int,int> ti;
template<typename T> bool chmin(T &a, T b){return (b < a) ? a = b, 1 : 0;}
template<typename T> bool chmax(T &a, T b){return (b > a) ? a = b, 1 : 0;}
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
void debug_out() {cerr<<endl;}
template <typename Head, typename... Tail>
void debug_out(Head _H, Tail... _T) {cerr<<" "<<to_string(_H);debug_out(_T...);}
#define debug(...) cerr<<"["<<#__VA_ARGS__<<"]:",debug_out(__VA_ARGS__)
int n;
map<int,set<int>> mp;
set<int> f(int x) {
if (mp.find(x) != mp.end()) {
return mp[x];
}
set<int> cur;
for (int i = 2; i <= sqrt(x); ++i) {
if (x % i == 0) {
for (auto j: f(x/i)) cur.insert(j+i-1);
}
}
cur.insert(x-1);
mp[x] = cur;
return cur;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin.exceptions(ios::badbit | ios::failbit);
cin >> n;
set<int> ans = f(n);
cout << ans.size() << '\n';
for (auto i: ans) cout << i << ' ';
return 0;
}
