18988011

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{547}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 34195200

約数和(自身を除く): 15207189

約数列:

[1, 3, 7, 9, 19, 21, 29, 57, 63, 87, 133, 171, 203, 261, 399, 547, 551, 609, 1197, 1641, 1653, 1827, 3829, 3857, 4923, 4959, 10393, 11487, 11571, 15863, 31179, 34461, 34713, 47589, 72751, 93537, 111041, 142767, 218253, 301397, 333123, 654759, 904191, 999369, 2109779, 2712573, 6329337, 18988011]

約数ペア:

[(1, 18988011), (3, 6329337), (7, 2712573), (9, 2109779), (19, 999369), (21, 904191), (29, 654759), (57, 333123), (63, 301397), (87, 218253), (133, 142767), (171, 111041), (203, 93537), (261, 72751), (399, 47589), (547, 34713), (551, 34461), (609, 31179), (1197, 15863), (1641, 11571), (1653, 11487), (1827, 10393), (3829, 4959), (3857, 4923)]