共犯的
公式
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φ ! ( n个 ) = Π φ ( n个 ) : = n个 ∏ 我 = 1 我 ⊥ n个 我 = n个 ∏ 我 = 1 ( 我 , n个 ) = 1 我 = n个 ∏ 我 = 1 我 [( 我 , n个 ) =1] ,
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φ ! ( n个 ) n个 φ ( n个 ) = Π φ ( n个 ) n个 φ ( n个 ) = ∏ d日 ∣ n个 d日 ! d日 d日 μ ( n个 d日 ) ,
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n个 ! = φ ! ( n个 ) x ̅ φ ! ( n个 ).
序列
{1, 1, 2, 3, 24, 5, 720, 105, 2240, 189, 3628800, 385, 479001600, 19305, 896896, 2027025, 20922789888000, 85085, 6402373705728000, 8729721, 47297536000, 1249937325, ...}
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{1, 2, 3, 8, 5, 144, 7, 384, 162, 19200, 11, 1244160, 13, 4515840, 1458000, 10321920, 17, 75246796800, 19, 278691840000, 1080203040, 899245670400, 23, 16686729658368000, 375000, ...}
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{1, 1, 3, 4, 10, 6, 21, 16, 27, 20, 55, 24, 78, 42, 60, 64, 136, 54, 171, 80, 126, 110, 253, 96, 250, 156, 243, 168, 406, 120, 465, 256, 330, 272, 420, 216, 666, 342, 468, 320, 820, 252, 903, 440, 540, ...}
-
{0, 2, 3, 6, 5, 15, 7, 20, 18, 35, 11, 54, 13, 63, 60, 72, 17, 117, 19, 130, 105, 143, 23, 204, 75, 195, 135, 238, 29, 345, 31, 272, 231, 323, 210, 450, 37, 399, 312, 500, 41, 651, 43, 550, 495, 575, 47, ...}