640668

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 1774080

約数和(自身を除く): 1133412

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 29, 42, 58, 84, 87, 116, 174, 203, 263, 348, 406, 526, 609, 789, 812, 1052, 1218, 1578, 1841, 2436, 3156, 3682, 5523, 7364, 7627, 11046, 15254, 22092, 22881, 30508, 45762, 53389, 91524, 106778, 160167, 213556, 320334, 640668]

約数ペア:

[(1, 640668), (2, 320334), (3, 213556), (4, 160167), (6, 106778), (7, 91524), (12, 53389), (14, 45762), (21, 30508), (28, 22881), (29, 22092), (42, 15254), (58, 11046), (84, 7627), (87, 7364), (116, 5523), (174, 3682), (203, 3156), (263, 2436), (348, 1841), (406, 1578), (526, 1218), (609, 1052), (789, 812)]