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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 1728 (number) ： ウィキペディア英語版 1728 (number) 1728 is the natural number following 1727 and preceding 1729. 1728 is a dozen gross, one great gross (or grand gross, or, in Germanic, Mass). ==In mathematics== It is the cube of 12 and, as such, is important in the duodecimal number system. It is the number of cubic inches in a cubic foot. 1728 occurs in the algebraic formula for the j-invariant of an elliptic curve. As a consequence, it is sometimes called a Zagier as a pun on the Gross–Zagier theorem. The number 1728 is one less than the Ramanujan number 1729. * 1728 = 123 * 1728 = 33 × 43 * 1728 = 23 × 63 * 1728 = 63 + 83 + 103 * 1728 = 242 + 242 + 242 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.