import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		
		Scanner n=new Scanner(System.in);
		
		int start = n.nextInt();
		int end = n.nextInt();
		int num = n.nextInt();
		int cnt = 0;
		
		for (int a = start;a<=end;a++){
			
			if ((num % a) == 0){
				cnt=cnt+1;
			}
		}
		System.out.println(cnt);
	}

}
/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