import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int a = 0;
		int b = 0;
		int c = 0;
		int div = 0;

		try(Scanner scan = new Scanner(System.in)) {
			a = scan.nextInt();
			b = scan.nextInt();
			c = scan.nextInt();

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