import java.io.*;
public class Main {
	
	public static void main(String[] args) throws IOException {
		int a, b, c, sum = 0;

		String[] str = new BufferedReader(new InputStreamReader(System.in)).readLine().split("\\s+");
		
		a = Integer.parseInt(str[0]);
		b = Integer.parseInt(str[1]);
		c = Integer.parseInt(str[2]);
				
		for (int i = a; i <= b; i++) sum += c %i == 0 ? 1 : 0;
				
		System.out.println(sum);
	}
}
/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