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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 Multiplicative digital root ： ウィキペディア英語版 Multiplicative digital root The multiplicative digital root of a positive integer ''n'' is found by multiplying the digits of ''n'' together, then repeating this operation until only a single digit remains. This single-digit number is called the multiplicative digital root of ''n''. Multiplicative digital roots depend upon the base in which ''n'' is written. If the term is used without qualification, it is assumed that ''n'' is written in base 10. Multiplicative digital roots are the multiplicative equivalent of digital roots. == Example == 9876 would be reduced as 9876 -> 9×8×7×6 = 3024 -> 3×0×2×4 = 0. So the multiplicative digital root of 9876 is 0 and its multiplicative persistence (the number of steps required to reach a single digit) is 2. 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「Multiplicative digital root」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.