18665721

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{4903}}^1$

素因数の和:4962

約数の個数: 20

約数和(自身を含む): 28482432

約数和(自身を除く): 9816711

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 4903, 14709, 44127, 132381, 230441, 397143, 691323, 2073969, 6221907, 18665721]

約数ペア:

[(1, 18665721), (3, 6221907), (9, 2073969), (27, 691323), (47, 397143), (81, 230441), (141, 132381), (423, 44127), (1269, 14709), (3807, 4903)]