21085680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{163}}^1$

素因数の和:204

約数の個数: 240

約数和(自身を含む): 83458944

約数和(自身を除く): 62373264

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 16, 20, 21, 22, 24, 28, 30, 33, 35, 40, 42, 44, 48, 49, 55, 56, 60, 66, 70, 77, 80, 84, 88, 98, 105, 110, 112, 120, 132, 140, 147, 154, 163, 165, 168, 176, 196, 210, 220, 231, 240, 245, 264, 280, 294, 308, 326, 330, 336, 385, 392, 420, 440, 462, 489, 490, 528, 539, 560, 588, 616, 652, 660, 735, 770, 784, 815, 840, 880, 924, 978, 980, 1078, 1141, 1155, 1176, 1232, 1304, 1320, 1470, 1540, 1617, 1630, 1680, 1793, 1848, 1956, 1960, 2156, 2282, 2310, 2352, 2445, 2608, 2640, 2695, 2940, 3080, 3234, 3260, 3423, 3586, 3696, 3912, 3920, 4312, 4564, 4620, 4890, 5379, 5390, 5705, 5880, 6160, 6468, 6520, 6846, 7172, 7824, 7987, 8085, 8624, 8965, 9128, 9240, 9780, 10758, 10780, 11410, 11760, 12551, 12936, 13040, 13692, 14344, 15974, 16170, 17115, 17930, 18256, 18480, 19560, 21516, 21560, 22820, 23961, 25102, 25872, 26895, 27384, 28688, 31948, 32340, 34230, 35860, 37653, 39120, 39935, 43032, 43120, 45640, 47922, 50204, 53790, 54768, 62755, 63896, 64680, 68460, 71720, 75306, 79870, 86064, 87857, 91280, 95844, 100408, 107580, 119805, 125510, 127792, 129360, 136920, 143440, 150612, 159740, 175714, 188265, 191688, 200816, 215160, 239610, 251020, 263571, 273840, 301224, 319480, 351428, 376530, 383376, 430320, 439285, 479220, 502040, 527142, 602448, 638960, 702856, 753060, 878570, 958440, 1004080, 1054284, 1317855, 1405712, 1506120, 1757140, 1916880, 2108568, 2635710, 3012240, 3514280, 4217136, 5271420, 7028560, 10542840, 21085680]

約数ペア:

[(1, 21085680), (2, 10542840), (3, 7028560), (4, 5271420), (5, 4217136), (6, 3514280), (7, 3012240), (8, 2635710), (10, 2108568), (11, 1916880), (12, 1757140), (14, 1506120), (15, 1405712), (16, 1317855), (20, 1054284), (21, 1004080), (22, 958440), (24, 878570), (28, 753060), (30, 702856), (33, 638960), (35, 602448), (40, 527142), (42, 502040), (44, 479220), (48, 439285), (49, 430320), (55, 383376), (56, 376530), (60, 351428), (66, 319480), (70, 301224), (77, 273840), (80, 263571), (84, 251020), (88, 239610), (98, 215160), (105, 200816), (110, 191688), (112, 188265), (120, 175714), (132, 159740), (140, 150612), (147, 143440), (154, 136920), (163, 129360), (165, 127792), (168, 125510), (176, 119805), (196, 107580), (210, 100408), (220, 95844), (231, 91280), (240, 87857), (245, 86064), (264, 79870), (280, 75306), (294, 71720), (308, 68460), (326, 64680), (330, 63896), (336, 62755), (385, 54768), (392, 53790), (420, 50204), (440, 47922), (462, 45640), (489, 43120), (490, 43032), (528, 39935), (539, 39120), (560, 37653), (588, 35860), (616, 34230), (652, 32340), (660, 31948), (735, 28688), (770, 27384), (784, 26895), (815, 25872), (840, 25102), (880, 23961), (924, 22820), (978, 21560), (980, 21516), (1078, 19560), (1141, 18480), (1155, 18256), (1176, 17930), (1232, 17115), (1304, 16170), (1320, 15974), (1470, 14344), (1540, 13692), (1617, 13040), (1630, 12936), (1680, 12551), (1793, 11760), (1848, 11410), (1956, 10780), (1960, 10758), (2156, 9780), (2282, 9240), (2310, 9128), (2352, 8965), (2445, 8624), (2608, 8085), (2640, 7987), (2695, 7824), (2940, 7172), (3080, 6846), (3234, 6520), (3260, 6468), (3423, 6160), (3586, 5880), (3696, 5705), (3912, 5390), (3920, 5379), (4312, 4890), (4564, 4620)]