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arXiv 2201.06939math.NT
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关于等差数列中因子和函数的幂值

On Power Values of Sum of Divisors function in Arithmetic Progressions

Sai Teja Somu, Vidyanshu Mishra

摘要:

令$a\geq 1, b\geq 0$和$k\geq 2$是任何给定的整数。证明了存在无穷多个自然数$m$,使得$m$的约数之和是完全$k$次幂.当$m$的值属于任意给定的无穷等差数列$an+b$时,我们试图推广这个结果。证明了若$a$与$b$互质,且$b$模$a$的阶与$k$互质,则存在无穷多个自然数$n$使得$an+b$的约数之和为完全$k$次幂.我们还证明了,在一般情况下,无论是$an+b$的因子之和是不是一个完美的$k$次幂的任何自然数$n$或$an+b$的因子之和是一个完美的$k$次幂的无限多个自然数$n$ .

英文摘要:

Let $a\geq 1, b\geq 0$ and $k\geq 2$ be any given integers. It has been proven that there exist infinitely many natural numbers $m$ such that sum of divisors of $m$ is a perfect $k$th power. We try to generalize this result when the values of $m$ belong to any given infinite arithmetic progression $an+b$. We prove if $a$ is relatively prime to $b$ and order of $b$ modulo $a$ is relatively prime to $k$ then there exist infinitely many natural numbers $n$ such that sum of divisors of $an+b$ is a perfect $k$th power. We also prove that, in general, either sum of divisors of $an+b$ is not a perfect $k$th power for any natural number $n$ or sum of divisors of $an+b$ is a perfect $k$th power for infinitely many natural numbers $n$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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