import java.util.Scanner; 
import java.util.Arrays; 
import java.util.Collections; 
public class Main {
  public static void main(String[] args) {
   Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
      int i,p=0;
      for(i=a;i<=b;i++){
          if(c % i == 0) p++;
      }
     System.out.println(p);
    sc.close();
  }
}

/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