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

public class Main {
	public static void main(String[] args)throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		String strArray[] = str.split(" ");
		int a = Integer.parseInt(strArray[0]);
		int b = Integer.parseInt(strArray[1]);
		int c = Integer.parseInt(strArray[2]);
		int count = 0;
		int i =a;
		while(i<=b){
			if(c%i==0){
				count +=1;
			}else{}
			i += 1;
			}
		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