The factors of the number 664,111,448 are: 1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 44, 52, 56, 77, 88, 91, 104, 127, 143, 154, 182, 254, 286, 308, 364, 508, 572, 616, 653, 728, 889, 1001, 1016, 1144, 1306, 1397, 1651, 1778, 2002, 2612, 2794, 3302, 3556, 4004, 4571, 5224, 5588, 6604, 7112, 7183, 8008, 8489, 9142, 9779, 11176, 11557, 13208, 14366, 16978, 18161, 18284, 19558, 23114, 28732, 33956, 36322, 36568, 39116, 46228, 50281, 57464, 59423, 67912, 72644, 78232, 82931, 92456, 93379, 100562, 118846, 127127, 145288, 165862, 186758, 201124, 237692, 254254, 331724, 373516, 402248, 475384, 508508, 580517, 653653, 663448, 747032, 912241, 1017016, 1078103, 1161034, 1307306, 1824482, 2156206, 2322068, 2614612, 3648964, 4312412, 4644136, 5229224, 6385687, 7297928, 7546721, 8624824, 11859133, 12771374, 15093442, 23718266, 25542748, 30186884, 47436532, 51085496, 60373768, 83013931, 94873064, 166027862, 332055724, 664111448.
If you add them up, you will get the total of 1,687,633,920.