import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;
class Main{
	public static void main(String[] args){
	Scanner scan = new Scanner(System.in);
	a = scan.nextInt();
	b = scan.nextInt();
	c = scan.nextInt();
	int n = 0;
	int kazu = 0;
	for(int i= a;i<=b;i++)
	{
		if (c%i == 0){
			kazu += 1;
		}
	}
	System.out.println(kazu);
}