编写一个控制台应用程序，求1000之内的所有“完数”。所谓“完数”是指一个数恰好等于它的所有因子之和。例如，6是完数，因为6=1+2+3。-Write a console application, and all of 1000,　End of a few.　The so-called　End of a few　refers to a number of precisely equivalent to it and all the factors. For example, the number 6 is finished, because 6 = 1+ 2+ 3.