import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args)  {

		Scanner scanner = new Scanner( System.in );

		ArrayList<Integer> nums = new ArrayList<Integer>();

		int a = Integer.parseInt( scanner.next() );
		int b = Integer.parseInt( scanner.next() );
		int c = Integer.parseInt( scanner.next() );

		for ( int i = 1; i <= c; i++ ) {
			if ( c % i == 0 ) {
				nums.add( i );
			}
		}

		int count = 0;
		for ( int num : nums ) {
			if ( num >= a && num <= b ) {
				count++;
			}
		}

		System.out.println( count );

		scanner.close();
	}
}
/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