18480917

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 24192000

約数和(自身を除く): 5711083

約数列:

[1, 7, 13, 29, 47, 91, 149, 203, 329, 377, 611, 1043, 1363, 1937, 2639, 4277, 4321, 7003, 9541, 13559, 17719, 30247, 49021, 56173, 91039, 124033, 203087, 393211, 637273, 1421609, 2640131, 18480917]

約数ペア:

[(1, 18480917), (7, 2640131), (13, 1421609), (29, 637273), (47, 393211), (91, 203087), (149, 124033), (203, 91039), (329, 56173), (377, 49021), (611, 30247), (1043, 17719), (1363, 13559), (1937, 9541), (2639, 7003), (4277, 4321)]