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 count = 0;
		
		for(int i=a;i<=b;i++)
		{
			if(c%i==0)
			{
				count++;
			}
		}
		System.out.println(count);
	}

}