import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Main{
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] line = br.readLine().split(" ");
		int a = Integer.parseInt(line[0]);
		int b = Integer.parseInt(line[1]);
		int c = Integer.parseInt(line[2]);
		int cnt = 0;
		for(int i= a; i <= b; i++){
			int x = c % i;
			if( x==0) cnt++;
		}
		System.out.println( cnt );
	}
}
/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