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- #include <iostream>
- #include <cmath>
- using namespace std;
- long long n,i,k;
- int main()
- {
- cin >> n;
- k=0;
- for ( i=1; i<=sqrt(n); i++)
- if (n%i==0)
- if(i!=n/i)
- k=k+i+n/i;
- else k=k+i;
- cout << k;
- return 0;
- }
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