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

public class Main {
	public static void main(String args[]) throws IOException{
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		String data[] = reader.readLine().split(" ");
		int a= Integer.parseInt(data[0]);
		int b= Integer.parseInt(data[1]);
		int c= Integer.parseInt(data[2]);
			
		int ans=0;
		for(int i=a; i<=b; i++){
			if(c%i==0)
				ans++;
		}
		System.out.println(Integer.toString(ans));
	}
}
/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