#include <bits/stdc++.h>
using namespace std;
int a, b, c;
int y[10000], i = 0;
void cal(int n) {
  for (int j = 1; j < n; j++) {
    if (c < j) break;
    int div = c % j;
    if (div == 0) {
      bool repeat = false;
      for (int k = 0; k < i; k++) {
        if (j == y[k]) {
          repeat = true;
          break;
        }
      }
      if (!repeat) y[i++] = div;
    }
  }
}
int main() {
  cin >> a >> b >> c;
  cal(sqrt(a));
  cal(sqrt(b));
  cout << i << endl;
  return 0;
}
