翻訳と辞書 Words near each other ・ 810s in poetry ・ 810th Bombardment Squadron ・ 810th Strategic Aerospace Division ・ 811 ・ 811 Nauheima ・ 811 Naval Air Squadron ・ 811 series ・ 8116 Jeanperrin ・ 811th Bombardment Squadron ・ 811th Cadet Squadron New Mexico Civl Air Patrol ・ 812 ・ 812 Adele ・ 812 Naval Air Squadron ・ 81203 Polynesia ・ 8123 Canaletto ・ 8128 (number) ・ 812th Aircraft Control and Warning Squadron ・ 812th Fighter-Bomber Squadron ・ 813 ・ 813 (film) ・ 813 Baumeia ・ 813 Naval Air Squadron ・ 813 series ・ 8131 Scanlon ・ 813th Fighter-Bomber Squadron ・ 813th Strategic Aerospace Division ・ 814 ・ 814 BC ・ 814 Naval Air Squadron ・ 814 Tauris Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 8128 (number) ： ウィキペディア英語版 8128 (number) 8128 is the integer following 8127 and preceding 8129. It is most notable for being a perfect number, and one of the earliest numbers to be recognized as such. As a perfect number, it is tied to the Mersenne prime 127, 27 − 1, with 26 (27 − 1) yielding 8128. Also related to its being a perfect number, 8128 is a harmonic divisor number. Another consequence of 8128 being a perfect number is that it has the same prime factors as the sum of its divisors, its cototient is a power of two, and it is a harmonic seed number (though there are deficient and abundant numbers that share these properties). 8128 is the 127th triangular number, the 64th hexagonal number, a happy number, the eighth 292-gonal number, and the fourth 1356-gonal number, as well as the 43rd centered nonagonal number. ==See also== * 8128 Nicomachus 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「8128 (number)」の詳細全文を読む スポンサード リンク 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.