#include <bits/stdc++.h>
using namespace std;
// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e9
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
#define sz size()
// input
template<class T> void IN(T& x) {cin >> x;}
template<class H, class... T> void IN(H& h, T&... t) {IN(h); IN(t...); }
// output
template<class T1, class T2> void OUT(const pair<T1,T2>& x);
template<class T> void OUT(const T& x) {cout << x;}
template<class H, class... T> void OUT(const H& h, const T&... t) {OUT(h); OUT(t...); }
template<class T1, class T2> void OUT(const pair<T1,T2>& x) {OUT(x.fi," ",x.se);}
template<class... T> void OUTL(const T&... t) {OUT(t..., "\n"); }
//===================//
// Added libraries //
//===================//
//===================//
//end added libraries//
//===================//
void program();
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
program();
}
//===================//
// begin program //
//===================//
const int MX = 5e5;
int n, m;
vi f;
map<int, set<int>> mem;
set<int> visited;
vi getFactors(ll x) {
vi ans;
for(ll y=2;y*y<=x;y++) {
if((x % y) == 0) {
ans.pb(y);
}
}
return ans;
}
set<int>& getAns(int x) {
if(visited.count(x)) return mem[x];
visited.insert(x);
vi f = getFactors(x);
set<int>& ans = mem[x];
ans.insert(x-1);
for(int i:f) {
set<int>& oans = getAns(x/i);
for(int o:oans) ans.insert(o+i-1);
}
return ans;
}
void program() {
IN(n);
set<int>& ans = getAns(n);
OUTL(ans.sz);
bool f=1;
FOR(i,ans) OUT(f?"":" ",i), f=0; OUTL();
}
