Good Bye 2018 C. New Year and the Sphere Transmission(思维)

#include <bits/stdc++.h>
#define ll long long
using namespace std;
int n;
vector<ll> v;

int main()
{
  scanf("%d",&n);
  for(int i=2;i*i<=n;i++){
    if(n % i == 0){
      v.push_back(i);
      if(i * i != n){
        v.push_back(n / i);
      }
    }
  }
  v.push_back(n);
  v.push_back(1);
  vector<ll> G;
  for(auto it : v){
    ll ans = n - it + 1;
    G.push_back((ans+1)*((ans-1)/it+1)/2);
  }
  sort(G.begin(),G.end());
  for(int i=0;i<G.size();i++){
    printf("%lld ",G[i]);
  }
  return 0;
}