19858905

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 39536640

約数和(自身を除く): 19677735

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 43, 45, 55, 99, 129, 135, 165, 215, 297, 311, 387, 473, 495, 645, 933, 1161, 1419, 1485, 1555, 1935, 2365, 2799, 3421, 4257, 4665, 5805, 7095, 8397, 10263, 12771, 13373, 13995, 17105, 21285, 30789, 40119, 41985, 51315, 63855, 66865, 92367, 120357, 147103, 153945, 200595, 361071, 441309, 461835, 601785, 735515, 1323927, 1805355, 2206545, 3971781, 6619635, 19858905]

約数ペア:

[(1, 19858905), (3, 6619635), (5, 3971781), (9, 2206545), (11, 1805355), (15, 1323927), (27, 735515), (33, 601785), (43, 461835), (45, 441309), (55, 361071), (99, 200595), (129, 153945), (135, 147103), (165, 120357), (215, 92367), (297, 66865), (311, 63855), (387, 51315), (473, 41985), (495, 40119), (645, 30789), (933, 21285), (1161, 17105), (1419, 13995), (1485, 13373), (1555, 12771), (1935, 10263), (2365, 8397), (2799, 7095), (3421, 5805), (4257, 4665)]