An image forming apparatus includes a formation unit and an overlap order number assignment unit. The formation unit divides a predetermined image and forms divided images of the predetermined image on plurality sheets of recording paper in a divided manner. The formation unit forms the divided images such that, among the plurality sheets of recording paper, on which the divided images are formed by the formation unit, at least one of the plurality sheets of recording paper includes an overlap portion used for overlapping the at least one of the plurality sheets of recording paper with a remainder of the plurality sheets of recording paper. The overlap order number assignment unit assigns the at least one of the plurality sheets of recording paper with an overlap order number, indicating an overlap order for overlapping the plurality sheets of recording paper, in the overlap portion.