import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a,b,c;
		int divisor = 0;

		a = scan.nextInt();
		b = scan.nextInt();
		c = scan.nextInt();

		for (int i = a; i <= b; i++)
			if (i != 0 && c % i == 0)divisor++;
		
		System.out.printf("%d\n", divisor);
	}
}
/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