import java.io.*;
import java.util.*;

class Main{
  public static void main(String[] args) throws IOException{
    Scanner scan=new Scanner(System.in);

    int a=Integer.parseInt(scan.next());
    int b=Integer.parseInt(scan.next());
    int c=Integer.parseInt(scan.next());
    int count=0;

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