目前一共找到47个完全数.
列举如下：
(2^2-1)*2^1
(2^3-1)*2^2
(2^5-1)*2^4
(2^7-1)*2^6
(2^13-1)*2^12
(2^17-1)*2^16
(2^19-1)*2^18
(2^31-1)*2^30
(2^61-1)*2^60
(2^89-1)*2^88
(2^107-1)*2^106
(2^127-1)*2^126
(2^521-1)*2^520
(2^607-1)*2^606
(2^1279-1)*2^1278
(2^2203-1)*2^2202
(2^2281-1)*2^2280
(2^3217-1)*2^3216
(2^4253-1)*2^4252
(2^4423-1)*2^4422
(2^9689-1)*2^9688
(2^9941-1)*2^9940
(2^11213-1)*2^11212
(2^19937-1)*2^19936
(2^21701-1)*2^21700
(2^23209-1)*2^23208
(2^44497-1)*2^44496
(2^86243-1)*2^86242
(2^110503-1)*2^110502
(2^132049-1)*2^132048
(2^216091-1)*2^216090
(2^756839-1)*2^756838
(2^859433-1)*2^859432
(2^1257787-1)*2^1257786
(2^1398269-1)*2^1398268
(2^2976221-1)*2^2976220
(2^3021377-1)*2^3021376
(2^6972593-1)*2^6972592
(2^13466917-1)*2^13466916
(2^20996011-1)*2^20996010
(2^24036583-1)*2^24036582
(2^25964951-1)*2^25964950
(2^30402457-1)*2^30402456
(2^32582657-1)*2^32582656
(2^43112609-1)*2^43112608
(2^37156667-1)*2^37156666
(2^42643801-1)*2^42643800
