import java.util.*;
class Main{
	static Scanner s = new Scanner(System.in);
	public static void main(String[] args) {
		int a=Integer.parseInt(s.next()),
		    b=Integer.parseInt(s.next()),
		    c=Integer.parseInt(s.next()),
		    cnt=0;
		for(int i=a;i<=b;i++) {
			if(c%i==0)
				cnt++;
		}
		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