import java.util.Scanner;

public class Main
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		int count = 0;
		int a = scan.nextInt();
		int b = scan.nextInt();
		int c = scan.nextInt();
		for(int i = a;i <= b;i++)
		{
			if(c%i==0)
			{
				count+=1;
			}
		}
		System.out.println(count);
	}
}

