DLMF:27.11.E5 (Q8074)

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DLMF:27.11.E5
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    n x σ α ( n ) = ζ ( α + 1 ) α + 1 x α + 1 + O ( x β ) , subscript 𝑛 𝑥 divisor-sigma 𝛼 𝑛 Riemann-zeta 𝛼 1 𝛼 1 superscript 𝑥 𝛼 1 Big-O superscript 𝑥 𝛽 {\displaystyle{\displaystyle\sum_{n\leq x}\sigma_{\alpha}\left(n\right)=\frac{% \zeta\left(\alpha+1\right)}{\alpha+1}x^{\alpha+1}+O\left(x^{\beta}\right),}}
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    DLMF:27.11.E5
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    β = max ( 1 , α ) 𝛽 1 𝛼 {\displaystyle{\displaystyle\beta=\max(1,\alpha)}}
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    O ( x ) Big-O 𝑥 {\displaystyle{\displaystyle O\left(\NVar{x}\right)}}
    C2.S1.E3.m2addec
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    ζ ( s ) Riemann-zeta 𝑠 {\displaystyle{\displaystyle\zeta\left(\NVar{s}\right)}}
    C25.S2.E1.m2adec
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    σ α ( n ) divisor-sigma 𝛼 𝑛 {\displaystyle{\displaystyle\sigma_{\NVar{\alpha}}\left(\NVar{n}\right)}}
    C27.S2.E10.m2aadec
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