18512307

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{263}}^1$

素因数の和:365

約数の個数: 40

約数和(自身を含む): 30666240

約数和(自身を除く): 12153933

約数列:

[1, 3, 9, 11, 27, 33, 79, 81, 99, 237, 263, 297, 711, 789, 869, 891, 2133, 2367, 2607, 2893, 6399, 7101, 7821, 8679, 20777, 21303, 23463, 26037, 62331, 70389, 78111, 186993, 228547, 234333, 560979, 685641, 1682937, 2056923, 6170769, 18512307]

約数ペア:

[(1, 18512307), (3, 6170769), (9, 2056923), (11, 1682937), (27, 685641), (33, 560979), (79, 234333), (81, 228547), (99, 186993), (237, 78111), (263, 70389), (297, 62331), (711, 26037), (789, 23463), (869, 21303), (891, 20777), (2133, 8679), (2367, 7821), (2607, 7101), (2893, 6399)]