18878457

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 29008000

約数和(自身を除く): 10129543

約数列:

[1, 3, 13, 19, 39, 57, 73, 219, 247, 349, 741, 949, 1047, 1387, 2847, 4161, 4537, 6631, 13611, 18031, 19893, 25477, 54093, 76431, 86203, 258609, 331201, 484063, 993603, 1452189, 6292819, 18878457]

約数ペア:

[(1, 18878457), (3, 6292819), (13, 1452189), (19, 993603), (39, 484063), (57, 331201), (73, 258609), (219, 86203), (247, 76431), (349, 54093), (741, 25477), (949, 19893), (1047, 18031), (1387, 13611), (2847, 6631), (4161, 4537)]