黃 煒,馬 焱
(1.寶雞職業(yè)技術(shù)學(xué)院基礎(chǔ)部,陜西寶雞 721013;2.寶雞文理學(xué)院經(jīng)濟(jì)管理系,陜西寶雞 721013)
關(guān)于除數(shù)函數(shù)與Smarandache k次補(bǔ)數(shù)的混合均值*
黃 煒1,馬 焱2
(1.寶雞職業(yè)技術(shù)學(xué)院基礎(chǔ)部,陜西寶雞 721013;2.寶雞文理學(xué)院經(jīng)濟(jì)管理系,陜西寶雞 721013)
對(duì)任意的正整數(shù)n,Smarandache k次冪補(bǔ)數(shù)Ak(n)定義為最小的正整數(shù)m,使得mn是完全k次冪數(shù).用解析的方法研究了除數(shù)函數(shù)τ(n)對(duì)補(bǔ)數(shù)列Ak(n)的復(fù)合函數(shù)τ(Ak(n))的混合均值并得到了一個(gè)漸近公式.
除數(shù)函數(shù);k-次冪補(bǔ)數(shù);均值;漸近公式
文獻(xiàn)[5]包含了證明以下引理所需要的基礎(chǔ)知識(shí).
引理3 設(shè)ε是任意正常數(shù),當(dāng)σ≥k-1時(shí),有
(1)B(s+1)在半平面Re s≥k-1+ε上有界且解析;
證明 對(duì)于任意素?cái)?shù)p,p的k次補(bǔ)數(shù)Ak(pn)為
(2)由定義知Ak(n)是積性函數(shù),又因?yàn)棣樱ˋk(m·n))=τ(Ak(m))·τ(Ak(n)),τ(Ak(n))也是積性函數(shù),所以由Ak(n)的定義及文獻(xiàn)[5]的有關(guān)定理有:當(dāng)σ≥k-1時(shí),τ(Ak(n))的Dirichlet級(jí)數(shù)為
定理1 設(shè)x≥1,則有漸近公式
[1] SMARANDACHE F.Only Problems,Not Solutions[M].Chicago:Xiquan Publishing House,1993.
[2] HUANG Wei.An Arithmetical Function and the Power Complements[C]//Research on Smaramtache Problems in Number Theory.Hexis,2005:123-124.
[3] 張紅莉,王 陽.關(guān)于平方補(bǔ)數(shù)除數(shù)函數(shù)的均值[J].紡織高?;A(chǔ)科學(xué)學(xué)報(bào),2002(1):44-46.
[4] 王 陽.立方冪補(bǔ)數(shù)除數(shù)函數(shù)的均值[J].數(shù)學(xué)的實(shí)踐與認(rèn)識(shí),2004,34(12):144-148.
[5] TOM M APOSTPL.Introduction to Analytic Number Theory[M].New York:Springer-Verlag,1976.
[6] PAN C D,PAN C B.Foundation of Analytic Number Theory[M].Beijing:Science Press,1997.
(責(zé)任編輯 向陽潔)
Mean Value of Divisor Function for Smarandache k-Power Complements
HUANG Wei1,MA yan2
(1.Department of Basic Courses,Baoji Vocational and Technical College,Baoji 721013,Shaanxi China;2.Department of Ecomomics and Management,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi China)
Let n be positive integer,the Smarandache k-power complements Ak(n)is defined as the smallest integer m such that mnis perfect k-th power.The mean value ofτ(Ak(n))is studied and an asymptotic formula is given by the analytic integral methods.
divisor function;k-power complement;mean value;asymptotic formula
O156.4
A
10.3969/j.issn.1007-2985.2013.05.002
1007-2985(2013)05-0003-03
2013-01-14
國(guó)家自然科學(xué)基金資助項(xiàng)目(11071194);陜西省自然科學(xué)基金資助項(xiàng)目(09JK432)
黃 煒(1961-),男,陜西岐山人,寶雞職業(yè)技術(shù)學(xué)院基礎(chǔ)部教授,主要從事解析數(shù)論與特殊函數(shù)研究;馬焱(1963-),女,陜西乾縣人,寶雞文理學(xué)院教授,主要從事財(cái)務(wù)管理研究.