18220905

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 33733440

約数和(自身を除く): 15512535

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 101, 171, 211, 285, 303, 505, 633, 855, 909, 1055, 1515, 1899, 1919, 3165, 4009, 4545, 5757, 9495, 9595, 12027, 17271, 20045, 21311, 28785, 36081, 60135, 63933, 86355, 106555, 180405, 191799, 319665, 404909, 958995, 1214727, 2024545, 3644181, 6073635, 18220905]

約数ペア:

[(1, 18220905), (3, 6073635), (5, 3644181), (9, 2024545), (15, 1214727), (19, 958995), (45, 404909), (57, 319665), (95, 191799), (101, 180405), (171, 106555), (211, 86355), (285, 63933), (303, 60135), (505, 36081), (633, 28785), (855, 21311), (909, 20045), (1055, 17271), (1515, 12027), (1899, 9595), (1919, 9495), (3165, 5757), (4009, 4545)]