题目网址: http://www.puzzleup.com/2018/
http://www.puzzleup.com/2018/puzzle/?9
答题时限: ９月27日７ＰＭ－比赛结束（约12月12日）
加分时限: ９月27日７ＰＭ－１０月3日６：５９ＰＭ
答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。
比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分　 　　 　
另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）　　
◆ABUNDANT NUMBER
An abundant number is a positive integer for which the sum of its proper
divisors (positive divisors different than the number) exceeds the number
itself. For example, 18 is an abundant number (18<1+2+3+6+9).
How many consecutive positive integers must be selected at minimum, in
order to guarantee that at least one of the selected numbers is abundant?
所谓过剩数为一正整数，其真因子(与该数不同之正因子)总和超过该数本身者。
举例来说，18便是个过剩数(18<1+2+3+6+9)。
问至少要连续取多少正整数，才能保证其中必有过剩数？