import java.util.Scanner;
public class Main{
	public static void main(String args[]){
	Scanner scan = new Scanner(System.in);
	System.out.println(""+countDivisors(scan.nextInt(),scan.nextInt(),scan.nextInt()));
	}
	
	static int countDivisors(int first, int last, int num){
		int count = 0;
		for(int i=first; i<=last; i++)
			if(num%i==0)
				count++;
		return 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