11. The document management system according to claim 8 , wherein the page count comparison unit is configured to determine, as a comparison criterion, whether the number of pages of candidate documents acquired by the candidate document page count acquisition unit is equal to or larger than the number of pages to be printed calculated by the print target page count calculation unit.
8. A document management system comprising: a document operation log recording unit configured to record, as an operation log of the document management system, a history of operations for each document managed by the document management system; a print log collecting unit configured to collect, as a print log of a printing device, a history of printing executed by the printing device; a log comparison unit configured to compare the operation log recorded by the document operation log recording unit with the print log collected by the print log collecting unit; a document printing determination unit configured to determine, based on a result of comparison by the log comparison unit, whether each document managed by the document management system was printed; a candidate document page count acquisition unit configured to read, when a plurality of candidate documents is determined as printed documents by the document printing determination unit, each candidate document managed by the document management system to acquire the number of pages of the candidate document; a print page information acquisition unit configured to acquire print page information from the print log determined to have the plurality of candidate documents; a print target page count calculation unit configured to calculate the number of pages to be printed based on the print page information acquired by the print page information acquisition unit; a page count comparison unit configured to compare the number of pages of each candidate document acquired by the candidate document page count acquisition unit with the number of pages to be printed calculated by the print target page count calculation unit; a print document identification unit configured to, based on a result of comparison by the page count comparison unit, identify a printed document out of the plurality of candidate documents; and a document print information updating unit configured to update, based on a result of determination by the document printing determination unit and a result of identification by the print document identification unit, print information of each document managed by the document management system.