自己也算约数地话 ,排在第3位的应该是 5020502.
约数列表：
20082008,10041004,5020502,2510251,275096,146584,137548,80008,73292,68774,40004,36646,34387,20002,18323,10001,2008,1096,1004,584,548,502,292,274,251,146,137,73,8,4,2,1