import java.util.*;

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

		
		
	}
}
/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