Supported by the National Natural Science Foundation of China(Grant No.10901002);the Natural Science Foundation of Anhui Province(Grant No.1208085QA02)
Let k1 ,k2 be nonzero integers with (k1, k2) = 1 and k1kk ≠-1. In this paper, we prove that there is a set A Z such that every integer can be represented uniquely in the form n = k1a1 + k2a2, a1,a2 ∈ A.
Supported by the National Natural Science Foundation of China(Grant No.10901002);the Natural Science Foundation of Anhui Province(Grant No.1208085QA02)
Let k ≥ 2 be an integer, and let a(n) denote the sum of the positive divisors of an integer n. We call n a quasi-multiperfect number if a(n) = kn + 1. In this paper, we give some necessary properties of quasi-mu...
supported by NSFC(No.10901002);supported by NSFC(No.11126173);the NSF of Anhui Province Education Committee(No.KJ2011Z151);the Research Culture Funds of Anhui Normal University(No.2012xmpy009);Anhui Province Natural Science Foundation(No.1208085QA02)
Supported by the NSF of China(10901002);the Research Culture Funds of Anhui Normal University(2012xmpy009);The second author is supported by the NSF of China(11126173);Anhui Province Natural Science Foundation(1208085QA02)
Supported by the NSF of China(11126173);Anhui Province Natural Science Foundation(1208085QA02);the NSF of China(10901002);the NSF of Anhui Province Education Committee(KJ2011Z151)
Supported by the National Natural Science Foundation of China (Grant No. 10901002);the Natural Science Foundation of Anhui Province (Grant No. 1208085QA02)
Let k ≥ 2 be an integer, and let σ(n) denote the sum of the positive divisors of an integer n. We call n a quasi-multiperfect number if σ(n) = kn + 1. In this paper, we give some necessary properties of them.