#include <bits/stdc++.h>
#define loop(i, a, b) for(long long i=a;i<b;i++)
#define pool(i, a, b) for(long long i=a-1;i>=b;i--)
#define fore(i, a) for(auto&& i:a)
#define fi first
#define se second
#define ps(a) push_back(a)
#define pb(a) pop_back(a)
#define sc scanf
#define vc vector
#define pa pair<ll, ll>
#define ll long long
#define lb lower_bound
#define ub upper_bound
#define all(a) a.begin(), a.end()
#define llmax LLONG_MAX/2
#define llmin -LLONG_MAX/2
using namespace std;
#define mn 100100
#define pa pair<ll, ll>
#define ld long double
set<ll> solve(ll n, ll l){
set<ll> ans;
if(n<l) return ans;
ans.insert(n-1);
for(ll i=l;i * i <=n;i++){
if(n%i==0){
fore(v, solve(n/i, i)) ans.insert(i-1+v);
}
}
return ans;
}
int main(){
ll n;cin >> n;
if(n==1){
cout << 1 <<endl<<0<<endl;
return 0;
}
auto ans=solve(n, 2);
cout << ans.size()<<endl;
fore(v, ans) cout << v <<" ";
}
