#include<bits/stdc++.h>
using namespace std;
using ll = long long;
set < ll > v;
void Go( ll x, ll n, ll cnt) {
v.insert(cnt + n - 1);
ll s, r = x;
while ( r * r <= n) {
if ( n % r == 0) {
s = n/r;
if ( s >= x) Go(s, n/s, cnt + s - 1);
Go(r, s, cnt + r - 1);
}
r ++;
}
return ;
}
int main() {
ll n, m, r, x, y, i, j, ans, t;
cin >> n;
Go(2, n, 0);
cout << v.size() << endl;
for ( ll X : v) {
cout << X << " ";
}
}
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