21296440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1669}}^1$

素因数の和:1720

約数の個数: 64

約数和(自身を含む): 54108000

約数和(自身を除く): 32811560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1669, 2552, 3190, 3338, 6380, 6676, 8345, 12760, 13352, 16690, 18359, 33380, 36718, 48401, 66760, 73436, 91795, 96802, 146872, 183590, 193604, 242005, 367180, 387208, 484010, 532411, 734360, 968020, 1064822, 1936040, 2129644, 2662055, 4259288, 5324110, 10648220, 21296440]

約数ペア:

[(1, 21296440), (2, 10648220), (4, 5324110), (5, 4259288), (8, 2662055), (10, 2129644), (11, 1936040), (20, 1064822), (22, 968020), (29, 734360), (40, 532411), (44, 484010), (55, 387208), (58, 367180), (88, 242005), (110, 193604), (116, 183590), (145, 146872), (220, 96802), (232, 91795), (290, 73436), (319, 66760), (440, 48401), (580, 36718), (638, 33380), (1160, 18359), (1276, 16690), (1595, 13352), (1669, 12760), (2552, 8345), (3190, 6676), (3338, 6380)]