20640460

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1873}}^1$

素因数の和:1930

約数の個数: 48

約数和(自身を含む): 47224800

約数和(自身を除く): 26584340

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 116, 145, 190, 290, 380, 551, 580, 1102, 1873, 2204, 2755, 3746, 5510, 7492, 9365, 11020, 18730, 35587, 37460, 54317, 71174, 108634, 142348, 177935, 217268, 271585, 355870, 543170, 711740, 1032023, 1086340, 2064046, 4128092, 5160115, 10320230, 20640460]

約数ペア:

[(1, 20640460), (2, 10320230), (4, 5160115), (5, 4128092), (10, 2064046), (19, 1086340), (20, 1032023), (29, 711740), (38, 543170), (58, 355870), (76, 271585), (95, 217268), (116, 177935), (145, 142348), (190, 108634), (290, 71174), (380, 54317), (551, 37460), (580, 35587), (1102, 18730), (1873, 11020), (2204, 9365), (2755, 7492), (3746, 5510)]