#include <bits/stdc++.h>
using namespace std;
set<int> s;
//set<int> v;
map<int,set<int> > m;
map<int,int> val;
set<int> dp(int n,int x)
{
if(n==1)
{
set<int> tmp;
tmp.insert(x);
return tmp;
}
set<int> tmp;
if(val.find(n)!=val.end())
{
for(auto it:m[n]) tmp.insert(it-val[n]+x);
return tmp;
}
for(int i=1;i<=sqrt(n);i++)
{
if(n%i==0)
{
if(i!=1)
{
set<int> t1 = dp(n/i,x+i-1);
for(auto it:t1) tmp.insert(it);
}
set<int> t2 = dp(i,x+n/i-1);
for(auto it:t2) tmp.insert(it);
}
}
val[n] = x;
m[n] = tmp;
return tmp;
}
int main()
{
int n;
cin>>n;
s = dp(n,0);
cout<<s.size()<<endl;
for(auto it:s) cout<<it<<" ";
cout<<endl;
}
