import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args)throws Exception {
    	InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);

       String[] input = br.readLine().split(" ");
       int a = Integer.parseInt(input[0]);
       int b = Integer.parseInt(input[1]);
       int c = Integer.parseInt(input[2]);
       int cum = 0;
       for(int x = a; x <= b ; x++){
    	   int ans = c % x;
    	   if(ans == 0){
    		   cum += 1;
    	   }
       }
       System.out.println(cum);
    }
}
/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