import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {
	public static void main(String[] args) {
		InputStreamReader isr = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(isr);
		try {
			String[] list = br.readLine().split(" ");
			int count = 0;
			int from = Integer.parseInt(list[0]);
			int to = Integer.parseInt(list[1]);
			int num = Integer.parseInt(list[2]);
			for (; from <= to; from++) {
				if (num % from == 0) {
					count++;
				}
			}
			System.out.println(count);

		} catch (IOException 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