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

class Main
{
	public static void main (String[] args) throws IOException
	{
  		Scanner in = new Scanner(System.in);
		String A = in.next();
		String B = in.next();
		String C = in.next();
		int a = Integer.parseInt(A);
		int b = Integer.parseInt(B);
		int c = Integer.parseInt(C);

		int count = 0;

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