21120990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{2207}}^1$

素因数の和:2257

約数の個数: 64

約数和(自身を含む): 57231360

約数和(自身を除く): 36110370

約数列:

[1, 2, 3, 5, 6, 10, 11, 15, 22, 29, 30, 33, 55, 58, 66, 87, 110, 145, 165, 174, 290, 319, 330, 435, 638, 870, 957, 1595, 1914, 2207, 3190, 4414, 4785, 6621, 9570, 11035, 13242, 22070, 24277, 33105, 48554, 64003, 66210, 72831, 121385, 128006, 145662, 192009, 242770, 320015, 364155, 384018, 640030, 704033, 728310, 960045, 1408066, 1920090, 2112099, 3520165, 4224198, 7040330, 10560495, 21120990]

約数ペア:

[(1, 21120990), (2, 10560495), (3, 7040330), (5, 4224198), (6, 3520165), (10, 2112099), (11, 1920090), (15, 1408066), (22, 960045), (29, 728310), (30, 704033), (33, 640030), (55, 384018), (58, 364155), (66, 320015), (87, 242770), (110, 192009), (145, 145662), (165, 128006), (174, 121385), (290, 72831), (319, 66210), (330, 64003), (435, 48554), (638, 33105), (870, 24277), (957, 22070), (1595, 13242), (1914, 11035), (2207, 9570), (3190, 6621), (4414, 4785)]