#include<bits/stdc++.h>
#define mp make_pair
#define mt make_tuple
#define ff first
#define ss second
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INFL = (1LL<<62)-1;
const int INF = (1<<30)-1;
const double EPS = 1e-7;
const int MOD = 1e9 + 7;
const int MAXN = 1e6+1;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
set<int> resp;
function<void(int,int,int)> bt =[&](int val, int cur, int sum){
for(int i = cur; i <= sqrt(val); i++){
if(val%i == 0)
bt(val/i,i,sum+i-1);
}
resp.insert(sum+val-1);
};
bt(n,2,0);
cout << resp.size() << '\n';
for(int i : resp)
cout << i << ' ';
cout << '\n';
return 0;
}
