func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long sum = 0;     int d[1000000 + 1] = {0};     for (int i = 1; i <= 1000000; i++) {       for (int j = i; j <= 1000000; j += i) {         d[j]++;       }     }     int a, b, c;     cin >> a >> b >> c;     for (auto(i) = (1); (i) < (a + 1); ++(i))       for (auto(j) = (1); (j) < (b + 1); ++(j))         for (auto(k) = (1); (k) < (c + 1); ++(k))           sum = (sum + d[i * j * k]) % 1073741824;     cout << sum % 1073741824;     return 0;   }   