1. An image processing apparatus comprising: a processor configured to serve at least as: an image data obtaining unit that obtains image data of an original document including a plurality of pages; a feature amount obtaining unit that obtains a predetermined feature amount for each of the pages based on the obtained image data; a detection unit that compares a feature amount of one page on which identification information for dividing the plurality of pages in units of pages is formed with a feature amount of the other pages to identify pages similar to the one page, and detects the identification information on the identified similar pages having a feature amount similar to a feature amount of the one page from among the other pages, wherein the identification information is based on QR Code; and a division unit that divides the plurality of pages in units of pages based on the detected identification information.