接受用户输入的的整数范围，输出这个范围之内的所有完全数。

[完全数是指等于其所有因子之和但不包括该数本身，如6=1X2X3， 6=1+2+3，6是一个完全数]-accept user input integer, the output within the scope of all the complete number. [References are fully equal to the sum of all factors, including but not the number itself, as 1X2X3 = 6, 6 = 1 2 3. 6 is a perfect number]