The factors of the number 353,778,840 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 17, 18, 20, 24, 27, 30, 34, 36, 40, 45, 51, 54, 60, 68, 72, 81, 85, 90, 102, 108, 120, 135, 136, 153, 162, 170, 180, 204, 216, 243, 255, 270, 306, 324, 340, 360, 405, 408, 459, 486, 510, 540, 612, 648, 680, 765, 810, 918, 972, 1020, 1080, 1215, 1224, 1377, 1530, 1620, 1836, 1944, 2040, 2141, 2295, 2430, 2754, 3060, 3240, 3672, 4131, 4282, 4590, 4860, 5508, 6120, 6423, 6885, 8262, 8564, 9180, 9720, 10705, 11016, 12846, 13770, 16524, 17128, 18360, 19269, 20655, 21410, 25692, 27540, 32115, 33048, 36397, 38538, 41310, 42820, 51384, 55080, 57807, 64230, 72794, 77076, 82620, 85640, 96345, 109191, 115614, 128460, 145588, 154152, 165240, 173421, 181985, 192690, 218382, 231228, 256920, 289035, 291176, 327573, 346842, 363970, 385380, 436764, 462456, 520263, 545955, 578070, 655146, 693684, 727940, 770760, 867105, 873528, 982719, 1040526, 1091910, 1156140, 1310292, 1387368, 1455880, 1637865, 1734210, 1965438, 2081052, 2183820, 2312280, 2601315, 2620584, 2948157, 3275730, 3468420, 3930876, 4162104, 4367640, 4913595, 5202630, 5896314, 6551460, 6936840, 7861752, 8844471, 9827190, 10405260, 11792628, 13102920, 14740785, 17688942, 19654380, 20810520, 23585256, 29481570, 35377884, 39308760, 44222355, 58963140, 70755768, 88444710, 117926280, 176889420, 353778840.
If you add them up, you will get the total of 1,263,094,560.