The factors of the number 420,136,332 are: 1, 2, 3, 4, 6, 7, 11, 12, 14, 21, 22, 28, 33, 37, 42, 44, 66, 74, 77, 84, 111, 132, 148, 154, 222, 231, 259, 308, 407, 444, 462, 518, 777, 814, 924, 1036, 1221, 1554, 1628, 2442, 2849, 3108, 4884, 5698, 8547, 11396, 12289, 17094, 24578, 34188, 36867, 49156, 73734, 86023, 135179, 147468, 172046, 258069, 270358, 344092, 405537, 454693, 516138, 540716, 811074, 909386, 946253, 1032276, 1364079, 1622148, 1818772, 1892506, 2728158, 2838759, 3182851, 3785012, 5001623, 5456316, 5677518, 6365702, 9548553, 10003246, 11355036, 12731404, 15004869, 19097106, 20006492, 30009738, 35011361, 38194212, 60019476, 70022722, 105034083, 140045444, 210068166, 420136332.
If you add them up, you will get the total of 1,255,349,760.