// ITP1_3

import java.util.Scanner;

class Main
{
	public static void main ( String[] args ) {
		Scanner sc = new Scanner ( System.in );

		int a = 0;
		int b = 0;
		int c = 0;
		int d = 0;
		int count = 0;

		a = sc.nextInt ();
		b = sc.nextInt ();
		c = sc.nextInt ();
		d = a;
	
		for (; a <= b; a++ ) {
			if ( c % a == 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