21249480

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{617}}^1$

素因数の和:679

約数の個数: 128

約数和(自身を含む): 74753280

約数和(自身を除く): 53503800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 41, 42, 56, 60, 70, 82, 84, 105, 120, 123, 140, 164, 168, 205, 210, 246, 280, 287, 328, 410, 420, 492, 574, 615, 617, 820, 840, 861, 984, 1148, 1230, 1234, 1435, 1640, 1722, 1851, 2296, 2460, 2468, 2870, 3085, 3444, 3702, 4305, 4319, 4920, 4936, 5740, 6170, 6888, 7404, 8610, 8638, 9255, 11480, 12340, 12957, 14808, 17220, 17276, 18510, 21595, 24680, 25297, 25914, 34440, 34552, 37020, 43190, 50594, 51828, 64785, 74040, 75891, 86380, 101188, 103656, 126485, 129570, 151782, 172760, 177079, 202376, 252970, 259140, 303564, 354158, 379455, 505940, 518280, 531237, 607128, 708316, 758910, 885395, 1011880, 1062474, 1416632, 1517820, 1770790, 2124948, 2656185, 3035640, 3541580, 4249896, 5312370, 7083160, 10624740, 21249480]

約数ペア:

[(1, 21249480), (2, 10624740), (3, 7083160), (4, 5312370), (5, 4249896), (6, 3541580), (7, 3035640), (8, 2656185), (10, 2124948), (12, 1770790), (14, 1517820), (15, 1416632), (20, 1062474), (21, 1011880), (24, 885395), (28, 758910), (30, 708316), (35, 607128), (40, 531237), (41, 518280), (42, 505940), (56, 379455), (60, 354158), (70, 303564), (82, 259140), (84, 252970), (105, 202376), (120, 177079), (123, 172760), (140, 151782), (164, 129570), (168, 126485), (205, 103656), (210, 101188), (246, 86380), (280, 75891), (287, 74040), (328, 64785), (410, 51828), (420, 50594), (492, 43190), (574, 37020), (615, 34552), (617, 34440), (820, 25914), (840, 25297), (861, 24680), (984, 21595), (1148, 18510), (1230, 17276), (1234, 17220), (1435, 14808), (1640, 12957), (1722, 12340), (1851, 11480), (2296, 9255), (2460, 8638), (2468, 8610), (2870, 7404), (3085, 6888), (3444, 6170), (3702, 5740), (4305, 4936), (4319, 4920)]