import java.util.Scanner;

public class Main{
    public static void main(String[] args){
	Scanner stdin = new Scanner(System.in);
	int a = stdin.nextInt();
	int b = stdin.nextInt();
	int c = stdin.nextInt();
	int i = a;
	int r = 0,s = 0;
	while(i<=b){
	    s = c%i;
	    boolean t = (s == 0);
	    if(t){r++;}
	    else{}
	    i++;
	}
	System.out.println(r);
    }
}
/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