39








































数表 — 整数


<<
30
31
32
33
34
35
36
37
38
39
>>



小写 三十九
大写 叁拾玖
质因数分解
3×13{displaystyle 3times 13}{displaystyle 3times 13}
罗马数字 XXXIX
二进制 100111
八进制 47
十二进制 33
十六进制 27

39是38与40之间的自然数。




目录






  • 1 数学性质


  • 2 在科学中


  • 3 在人类文化中


  • 4 在其它领域中


  • 5 参考資料





数学性质



  • 第26個合數，正因數有1、3、13和39。前一個為38、下一個為40。

    質因數分解為3×13{displaystyle 3times 13}{displaystyle 3times 13}。


  • 第31個虧數，真因數和為17，虧度為22。前一個為38、下一個為41。

  • 第26個不尋常數，大於平方根的質因數為13。前一個為38、下一個為41。

  • 第15個半質數。前一個為38、下一個為46。

  • 第26個無平方數因數的數。前一個為38、下一個為41。

  • 第17個十进制的奢侈數。前一個為38、下一個為40。


  • 2之後首五個素数之和：3+5+7+11+13{displaystyle 3+5+7+11+13}3+5+7+11+13

  • 首三個3的冪之和：31+32+33{displaystyle 3^{1}+3^{2}+3^{3}}3^1+3^2+3^3

  • 第三个14边形数



在科学中



  • 釔的原子序數[1]


在人类文化中



在其它领域中




  • 義大利的國際電話區號


  • 約翰·布臣的冒險小說《三十九級臺階》

  • 日語「3（さん）」與「9（きゅう）」分別發音近似英語「Thank you」，則「感謝」


    • 近畿小子出道十周年紀念精選集《39》


    • 下川美娜首張專輯《39~Thank you~》


    • 音樂軟件初音未來（初音ミク），因在日語中39是「ミク」的諧音[2]。





参考資料





  1. ^ Royal Society of Chemistry - Visual Element Periodic Table


  2. ^ 賞金10万円が受賞者に--第3回国際ニコニコ映画祭の大賞が決定. CNET Japan. 2008-02-25 [2008-02-27] （日语）. 











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