import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = Integer.parseInt(scan.next());
		int b = Integer.parseInt(scan.next());
		int c = Integer.parseInt(scan.next());
		scan.close();
		int count=0;	
		for(int i=1;i<=c;i++){
			if(c%i==0)
				if(i>=a&&i<=b)
					count++;
		}
		System.out.println(count);
		
	}

}
/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