import java.util.Scanner;

class Main
{
public static void main(String[] args)
{
	Scanner scan = new Scanner(System.in);
	
	int a = scan.nextInt();
	int b = scan.nextInt();
	int c = scan.nextInt();
	
	int x = 0;
	
	for (int i=a; i<=b; i++){
		if (c%i==0){
			x++;}}
	
	System.out.println(x);
	}
}
