#include <bits/stdc++.h>
#define ll long long
#define pi pair<int, char>
#define pint pair<int, int>
#define ff first
#define ss second
#define pb push_back
#define all(v) v.begin(), v.end()
#define allsir(v) v+1, v+n+1
#define inf 1e9
using namespace std;
const string file = "";
ifstream fin(file+".in");
ofstream fout(file+".out");
const int dim = 300001, dim2 = 500001, mod = 1e9+7;
int k, i;
void solve()
{
cin >> k;
ll sum = 0;
// b = 1
int a, b;
for (i = 1; i <= k; i++)
cin >> a >> b, sum += a;
vector<ll> Dims;
Dims.pb(1);
Dims.pb(sum);
for (ll i = 2; i*i <= sum; i++)
if (sum % i == 0)
{
Dims.pb(i);
if (sum/i != i)
Dims.pb(sum/i);
}
sort(all(Dims));
cout << Dims.size() << '\n';
for (auto x : Dims)
cout << x << '\n';
}
int main()
{
int t = 1;
ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
//cin >> t;
while (t--)
solve();
return 0;
}
