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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 54 (number) ： ウィキペディア英語版 54 (number) 54 (fifty-four) is the natural number following 53 and preceding 55. ==In mathematics== 54 is a 19-gonal number. Twice the third power of three, 54 is a Leyland number. 54 can be written as the sum of three squares in three different ways: $7^2\; +\; 2^2\; +\; 1^2\; =\; 6^2\; +\; 2(3^2)\; =\; 2(5^2)\; +\; 2^2\; =\; 54$. It is the smallest number with this property. Like all other multiples of 6, it is a semiperfect number. The factorial of 54 is 230,­843,­697,­339,­241,­380,­472,­092,­742,­683,­027,­581,­083,­278,­564,­571,­807,­941,­132,­288,­000,­000,­000,­000, or approximately 230.843697339241 x 1069. In base 10, 54 is a Harshad number. The Holt graph has 54 edges. The sine of an angle of 54 degrees is half the golden ratio. 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「54 (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.