import java.io.IOException;
import java.util.Scanner;

class Main {

	public static void main(String[] args) throws IOException {

		Scanner scan = new Scanner(System.in);

		int a, b,c;
		int counter = 0;

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

		for(int i = a; i<=b;i++){

			if((c%i)==0){
				counter++;
			}
		}
		System.out.println(counter);



	}
}
/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