翻訳と辞書 Words near each other ・ 2146 Stentor ・ 21468 Saylor ・ 2147483647 (number) ・ 2148 Epeios ・ 214th ・ 214th (Saskatchewan) Battalion, CEF ・ 214th Brigade (United Kingdom) ・ 214th Coastal Division (Italy) ・ 214th Field Artillery Regiment ・ 214th Fires Brigade (United States) ・ 214th Infantry Brigade (United Kingdom) ・ 214th Infantry Division (Wehrmacht) ・ 214th Reconnaissance Group ・ 214th Reconnaissance Squadron ・ 215 ・ 215 (number) ・ 215 BC ・ 215 Oenone ・ 215 series ・ 215 Signal Squadron ・ 2150 (disambiguation) ・ 2150 AD ・ 21509 Lucascavin ・ 2151 Hadwiger ・ 21517 Dobi ・ 21540 Itthipanyanan ・ 21541 Friskop ・ 21550 Laviolette ・ 2156 Kate ・ 21561 Masterman 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 215 (number) ： ウィキペディア英語版 215 (number) 215 (two hundred and fifteen) is the natural number following 214 and preceding 216. ==In mathematics== *215 is a composite number and a semiprime. *$215\; =\; (3!)^3\; -\; 1$ *215 is the second smallest integer (after 5) such that $n^2-17$ is twice a square: $215^2-17\; =\; 2\; \backslash times\; 152^2\backslash ,$. *There are 215 sequences of four integers, counting re-arrangements as distinct, such that the sum of their reciprocals is 1. These are * *24 arrangements of (2,3,7,42), (2,3,8,24), (2,3,9,18), (2,3,10,15), (2,4,5,20) and (2,4,6,12). * *12 arrangements of (3,3,4,12), (3,4,4,6), (2,3,12,12), (2,4,8,8) and (2,5,5,10). * *6 arrangements of (3,3,6,6). * *4 arrangements of (2,6,6,6). * *1 arrangement of (4,4,4,4). 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「215 (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.