import java.io.*;

class Main{
  public static void main(String[] args) throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str1 = br.readLine();
    String[] str2 = str1.split(" ");

    int count = 0;
    int a = Integer.parseInt(str2[0]);
    int b = Integer.parseInt(str2[1]);
    int c = Integer.parseInt(str2[2]);
    int d;
    for (int i = a; i <= b; i++){
      d = c % i;
      if (d == 0){count++;}
    }
    System.out.println(count);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz