import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;


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

}
/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