import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int can_n = 0;
		int kaisu = 3;
		int[] num = new int[kaisu];
		for(int i = 0; i < kaisu; i++) {
			num[i] = scan.nextInt();
		}
		for(int i = num[0]; i <= num[1] ;i++) {
			if(num[2] % i == 0) can_n++;
		}
		System.out.println(can_n);

 }
}
/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