使用Javascript实现Amicable numbers

使用Javascript实现Amicable numbers2014-09-23问题描述：

Let d（n） be defined as the sum of proper divisors of n （numbers less than n which divide evenly into n）.
If d（a） = b and d（b） = a, where a b, then a and b are an amicable pair and each of a and b are called amicable numbers.

For example, the proper divisors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110; therefore d（220） = 284. The proper divisors of 284 are 1, 2, 4, 71 and 142; so d（284） = 220.

Evaluate the sum of all the amicable numbers under 10000.

实现：

（function（）{var factor = function （n）{var arr = new Array（）;for（var i = 1;i < n; i++）{if（n%i == 0 && arr.indexOf（i） == -1）arr.push（i）;}return arr;}var sumArr = function（arr）{var sum = 0 ;for（var i = 0 ; i < arr.length; i++）sum += arr[i];return sum ;}for（var i = 2;i< 10000; i++）{var r1 = sumArr（factor（i））;var r2 = sumArr（factor（r1））;if（i == r2 && i ！= r1）console.log（"num1 : " + i + ", num2 : " + r1）;}}）（）;