21905037

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{433}}^1$

素因数の和:530

約数の個数: 48

約数和(自身を含む): 40080768

約数和(自身を除く): 18175731

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 73, 77, 99, 219, 231, 433, 511, 657, 693, 803, 1299, 1533, 2409, 3031, 3897, 4599, 4763, 5621, 7227, 9093, 14289, 16863, 27279, 31609, 33341, 42867, 50589, 94827, 100023, 221263, 284481, 300069, 347699, 663789, 1043097, 1991367, 2433893, 3129291, 7301679, 21905037]

約数ペア:

[(1, 21905037), (3, 7301679), (7, 3129291), (9, 2433893), (11, 1991367), (21, 1043097), (33, 663789), (63, 347699), (73, 300069), (77, 284481), (99, 221263), (219, 100023), (231, 94827), (433, 50589), (511, 42867), (657, 33341), (693, 31609), (803, 27279), (1299, 16863), (1533, 14289), (2409, 9093), (3031, 7227), (3897, 5621), (4599, 4763)]