The factors of the number 88,639,320 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 20, 21, 22, 24, 28, 30, 33, 35, 40, 42, 44, 53, 55, 56, 60, 66, 70, 77, 84, 88, 105, 106, 110, 120, 132, 140, 154, 159, 165, 168, 181, 210, 212, 220, 231, 264, 265, 280, 308, 318, 330, 362, 371, 385, 420, 424, 440, 462, 530, 543, 583, 616, 636, 660, 724, 742, 770, 795, 840, 905, 924, 1060, 1086, 1113, 1155, 1166, 1267, 1272, 1320, 1448, 1484, 1540, 1590, 1749, 1810, 1848, 1855, 1991, 2120, 2172, 2226, 2310, 2332, 2534, 2715, 2915, 2968, 3080, 3180, 3498, 3620, 3710, 3801, 3982, 4081, 4344, 4452, 4620, 4664, 5068, 5430, 5565, 5830, 5973, 6335, 6360, 6996, 7240, 7420, 7602, 7964, 8162, 8745, 8904, 9240, 9593, 9955, 10136, 10860, 11130, 11660, 11946, 12243, 12670, 13937, 13992, 14840, 15204, 15928, 16324, 17490, 19005, 19186, 19910, 20405, 21720, 22260, 23320, 23892, 24486, 25340, 27874, 28779, 29865, 30408, 32648, 34980, 38010, 38372, 39820, 40810, 41811, 44520, 47784, 47965, 48972, 50680, 55748, 57558, 59730, 61215, 67151, 69685, 69960, 76020, 76744, 79640, 81620, 83622, 95930, 97944, 105523, 111496, 115116, 119460, 122430, 134302, 139370, 143895, 152040, 163240, 167244, 191860, 201453, 209055, 211046, 230232, 238920, 244860, 268604, 278740, 287790, 316569, 334488, 335755, 383720, 402906, 418110, 422092, 489720, 527615, 537208, 557480, 575580, 633138, 671510, 738661, 805812, 836220, 844184, 1007265, 1055230, 1151160, 1266276, 1343020, 1477322, 1582845, 1611624, 1672440, 2014530, 2110460, 2215983, 2532552, 2686040, 2954644, 3165690, 3693305, 4029060, 4220920, 4431966, 5909288, 6331380, 7386610, 8058120, 8863932, 11079915, 12662760, 14773220, 17727864, 22159830, 29546440, 44319660, 88639320.
If you add them up, you will get the total of 339,655,680.