/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: kschelbach https://cdn.slidesharecdn.com/profile-photo-kschelbach-48x48.jpg?cb=1666071340 2520 can be divided by 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 without having a fractional leftover. Magic.