The factors of the number 663,520,740 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 97, 173, 194, 291, 346, 388, 485, 519, 582, 659, 692, 865, 970, 1038, 1164, 1318, 1455, 1730, 1940, 1977, 2076, 2595, 2636, 2910, 3295, 3460, 3954, 5190, 5820, 6590, 7908, 9885, 10380, 13180, 16781, 19770, 33562, 39540, 50343, 63923, 67124, 83905, 100686, 114007, 127846, 167810, 191769, 201372, 228014, 251715, 255692, 319615, 335620, 342021, 383538, 456028, 503430, 570035, 639230, 684042, 767076, 958845, 1006860, 1140070, 1278460, 1368084, 1710105, 1917690, 2280140, 3420210, 3835380, 6840420, 11058679, 22117358, 33176037, 44234716, 55293395, 66352074, 110586790, 132704148, 165880185, 221173580, 331760370, 663520740.
If you add them up, you will get the total of 1,890,725,760.