public class How_Many_Divisors {

  static void Main(string[] args) {

    var line = System.Console.ReadLine().Trim().Split(' ');
    int a = int.Parse(line[0]);
    int b = int.Parse(line[1]);
    int c = int.Parse(line[2]);

    int counter = 0;

    for (int i = a; i <= b; i++) {
      if(c % i == 0) {
        counter += 1;
      }
    }


  }

}