20816190

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{829}}^1$

素因数の和:879

約数の個数: 80

約数和(自身を含む): 57847680

約数和(自身を除く): 37031490

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 31, 45, 54, 62, 81, 90, 93, 135, 155, 162, 186, 270, 279, 310, 405, 465, 558, 810, 829, 837, 930, 1395, 1658, 1674, 2487, 2511, 2790, 4145, 4185, 4974, 5022, 7461, 8290, 8370, 12435, 12555, 14922, 22383, 24870, 25110, 25699, 37305, 44766, 51398, 67149, 74610, 77097, 111915, 128495, 134298, 154194, 223830, 231291, 256990, 335745, 385485, 462582, 671490, 693873, 770970, 1156455, 1387746, 2081619, 2312910, 3469365, 4163238, 6938730, 10408095, 20816190]

約数ペア:

[(1, 20816190), (2, 10408095), (3, 6938730), (5, 4163238), (6, 3469365), (9, 2312910), (10, 2081619), (15, 1387746), (18, 1156455), (27, 770970), (30, 693873), (31, 671490), (45, 462582), (54, 385485), (62, 335745), (81, 256990), (90, 231291), (93, 223830), (135, 154194), (155, 134298), (162, 128495), (186, 111915), (270, 77097), (279, 74610), (310, 67149), (405, 51398), (465, 44766), (558, 37305), (810, 25699), (829, 25110), (837, 24870), (930, 22383), (1395, 14922), (1658, 12555), (1674, 12435), (2487, 8370), (2511, 8290), (2790, 7461), (4145, 5022), (4185, 4974)]