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- #include <iostream>
- #include <iomanip>
- #include <cmath>
- #include <algorithm>
- #include <string>
- #include <sstream>
- #include <set>
- #include <map>
- #include <unordered_map>
- #include <vector>
- #include <stack>
- #include <deque>
- using namespace std;
- int main() {
- ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
- long long n;
- cin >> n;
- long long ans=1+n;
- for (int i=2; i*i<=n; i++) {
- if (i*i==n && n%i==0) ans+=i;
- else if (n%i==0) ans+=i+n/i;
- }
- if (n==1) ans--;
- cout << ans;
- return 0;
- }
- /*
- *
- * */
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