Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #include <bits/stdc++.h>
- using namespace std;
- #define ll long long
- #define maX 20000002
- ll ans[maX],di[maX];
- int main()
- {
- ll i,j,k,l;
- for(i=1; i<=maX; i++)
- {
- for(j=i; j<=maX; j+=i)
- {
- di[j]+=i;
- }
- }
- for(i=2; i<=maX; i++)
- {
- ans[i]=di[i]+ans[i-1];
- }
- while(cin>>k && k)
- {
- cout<<ans[k]<<endl;
- }
- return 0;
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement