18405009

素因数分解:

$3^3\times 7^1\times {\mathrm{97381}}^1$

素因数の和:97397

約数の個数: 16

約数和(自身を含む): 31162240

約数和(自身を除く): 12757231

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 97381, 292143, 681667, 876429, 2045001, 2629287, 6135003, 18405009]

約数ペア:

[(1, 18405009), (3, 6135003), (7, 2629287), (9, 2045001), (21, 876429), (27, 681667), (63, 292143), (189, 97381)]