The factors of the number 520,346,540 are: 1, 2, 4, 5, 7, 10, 14, 17, 19, 20, 28, 34, 35, 37, 38, 68, 70, 74, 76, 85, 95, 119, 133, 140, 148, 170, 185, 190, 238, 259, 266, 311, 323, 340, 370, 380, 476, 518, 532, 595, 622, 629, 646, 665, 703, 740, 1036, 1190, 1244, 1258, 1292, 1295, 1330, 1406, 1555, 1615, 2177, 2261, 2380, 2516, 2590, 2660, 2812, 3110, 3145, 3230, 3515, 4354, 4403, 4522, 4921, 5180, 5287, 5909, 6220, 6290, 6460, 7030, 8708, 8806, 9044, 9842, 10574, 10885, 11305, 11507, 11818, 11951, 12580, 14060, 17612, 19684, 21148, 21770, 22015, 22610, 23014, 23636, 23902, 24605, 26435, 29545, 37009, 41363, 43540, 44030, 45220, 46028, 47804, 49210, 52870, 57535, 59090, 59755, 74018, 80549, 82726, 83657, 88060, 98420, 100453, 105740, 115070, 118180, 119510, 148036, 161098, 165452, 167314, 185045, 195619, 200906, 206815, 218633, 230140, 239020, 322196, 334628, 370090, 391238, 401812, 402745, 413630, 418285, 437266, 502265, 703171, 740180, 782476, 805490, 827260, 836570, 874532, 978095, 1004530, 1093165, 1369333, 1406342, 1530431, 1610980, 1673140, 1956190, 2009060, 2186330, 2738666, 2812684, 3060862, 3515855, 3716761, 3912380, 4372660, 5477332, 6121724, 6846665, 7031710, 7433522, 7652155, 13693330, 14063420, 14867044, 15304310, 18583805, 26017327, 27386660, 30608620, 37167610, 52034654, 74335220, 104069308, 130086635, 260173270, 520346540.
If you add them up, you will get the total of 1,434,101,760.