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

public class Main {

	public static void main(String[] args) throws IOException{
		int counter = 0;
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] inputNum = br.readLine().split(" ");
		int a = Integer.parseInt(inputNum[0]);
		int b = Integer.parseInt(inputNum[1]);
		int c = Integer.parseInt(inputNum[2]);

		for(int i = a; i<= b ; i++){
			if(c%i == 0){
				counter++;
			}
		}
		System.out.println(counter);
	}

}
/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