216999

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{47}}^1$

素因数の和:81

約数の個数: 24

約数和(自身を含む): 349440

約数和(自身を除く): 132441

約数列:

[1, 3, 9, 19, 27, 47, 57, 81, 141, 171, 243, 423, 513, 893, 1269, 1539, 2679, 3807, 4617, 8037, 11421, 24111, 72333, 216999]

約数ペア:

[(1, 216999), (3, 72333), (9, 24111), (19, 11421), (27, 8037), (47, 4617), (57, 3807), (81, 2679), (141, 1539), (171, 1269), (243, 893), (423, 513)]