import java.io.*;
import java.util.StringTokenizer;

class Main {
	public static void main(String args[]) {
		InputStreamReader isr = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(isr);

		try {
			String buf = br.readLine();
			StringTokenizer st = new StringTokenizer(buf);

			int a = Integer.parseInt(st.nextToken());
			int b = Integer.parseInt(st.nextToken());
			int c = Integer.parseInt(st.nextToken());
			int count = 0;
			for (int i=a;i<=b;i++) {
				if (c%i==0) count++;
			}
			System.out.println(count);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
/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