#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define fi first
#define se second
#define all(a) (a).begin(),(a).end()
#define __buitin_popcount __builtin_popcountll
#define BIT(x,i) (((x)>>(i))&1ll)
#define MASK(i) (1ll<<(i))
template<class X,class Y> bool maximize(X &x,Y y)
{
if(x<y)
{
x=y;
return 1;
}
return 0;
}
template<class X,class Y> bool minimize(X &x,Y y)
{
if(y<x)
{
x=y;
return 1;
}
return 0;
}
const int inf=1e9+412009;
const ll INF=2e18+412009;
ll n;
set<ll> res;
void calc(ll n,ll x,ll sum)
{
res.insert(sum+n-1);
for(;x<=n/x;x++) if(n%x==0) calc(n/x,x,sum+x-1);
}
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
cin>>n;
calc(n,2,0);
cout<<res.size()<<'\n';
for(ll x:res) cout<<x<<' ';
return 0;
}
