21406140

素因数分解:

$2^2\times 3^3\times 5^1\times 7^2\times {\mathrm{809}}^1$

素因数の和:841

約数の個数: 144

約数和(自身を含む): 77565600

約数和(自身を除く): 56159460

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 49, 54, 60, 63, 70, 84, 90, 98, 105, 108, 126, 135, 140, 147, 180, 189, 196, 210, 245, 252, 270, 294, 315, 378, 420, 441, 490, 540, 588, 630, 735, 756, 809, 882, 945, 980, 1260, 1323, 1470, 1618, 1764, 1890, 2205, 2427, 2646, 2940, 3236, 3780, 4045, 4410, 4854, 5292, 5663, 6615, 7281, 8090, 8820, 9708, 11326, 12135, 13230, 14562, 16180, 16989, 21843, 22652, 24270, 26460, 28315, 29124, 33978, 36405, 39641, 43686, 48540, 50967, 56630, 67956, 72810, 79282, 84945, 87372, 101934, 109215, 113260, 118923, 145620, 152901, 158564, 169890, 198205, 203868, 218430, 237846, 254835, 305802, 339780, 356769, 396410, 436860, 475692, 509670, 594615, 611604, 713538, 764505, 792820, 1019340, 1070307, 1189230, 1427076, 1529010, 1783845, 2140614, 2378460, 3058020, 3567690, 4281228, 5351535, 7135380, 10703070, 21406140]

約数ペア:

[(1, 21406140), (2, 10703070), (3, 7135380), (4, 5351535), (5, 4281228), (6, 3567690), (7, 3058020), (9, 2378460), (10, 2140614), (12, 1783845), (14, 1529010), (15, 1427076), (18, 1189230), (20, 1070307), (21, 1019340), (27, 792820), (28, 764505), (30, 713538), (35, 611604), (36, 594615), (42, 509670), (45, 475692), (49, 436860), (54, 396410), (60, 356769), (63, 339780), (70, 305802), (84, 254835), (90, 237846), (98, 218430), (105, 203868), (108, 198205), (126, 169890), (135, 158564), (140, 152901), (147, 145620), (180, 118923), (189, 113260), (196, 109215), (210, 101934), (245, 87372), (252, 84945), (270, 79282), (294, 72810), (315, 67956), (378, 56630), (420, 50967), (441, 48540), (490, 43686), (540, 39641), (588, 36405), (630, 33978), (735, 29124), (756, 28315), (809, 26460), (882, 24270), (945, 22652), (980, 21843), (1260, 16989), (1323, 16180), (1470, 14562), (1618, 13230), (1764, 12135), (1890, 11326), (2205, 9708), (2427, 8820), (2646, 8090), (2940, 7281), (3236, 6615), (3780, 5663), (4045, 5292), (4410, 4854)]