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


public class Main {
	public static void main (String[] args) throws java.lang.Exception
	{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String x;
		int a, b, c, count = 0;
		x = br.readLine();
		String[] ary = x.split(" ");
		a = Integer.parseInt(ary[0]);
		b = Integer.parseInt(ary[1]);
		c = Integer.parseInt(ary[2]);
		
		for(int i = a; i <= b; i++){
			if(c%i==0){
				count++;
			}
		}
		
		System.out.println(count);

	}
}
/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