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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8. 	ios_base::sync_with_stdio(false);
  9. 	cin.tie(NULL);
  10.  
  11.     ll n, ans=0, num;
  12.     cin >> n;
  13.     ll arr[1000001];
  14.     memset(arr, 0, sizeof(arr));
  15.     for(ll i=2; i*i<=1e6; i++){
  16.         if(!arr[i]){
  17.             for(ll j=i*i; j<=1e6; j+=i)
  18.                 arr[j]=i;
  19.         }
  20.     }
  21.     for(ll i=2; i<=1e6; i++)
  22.         if(!arr[i])
  23.             arr[i]=i;
  24.     for(ll i=2; i*i<=n; i++){
  25.         if(n%i==0 && arr[i]==i){
  26.             ll cnt=0, num=n;
  27.             while(num%i==0){
  28.                 cnt++;
  29.                 num/=i;
  30.             }
  31.             ans+=(ll)((sqrt(1.0+(8.0*cnt))-1)/2.0);
  32.         }
  33.     }
  34.     cout << ans << endl;
  35.  
  36. 	return 0;
  37. }
  38.  
Success #stdin #stdout 0.01s 11344KB
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https://ideone.com/v9seC2
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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