17990721

素因数分解:

$3^3\times 7^1\times {\mathrm{95189}}^1$

素因数の和:95205

約数の個数: 16

約数和(自身を含む): 30460800

約数和(自身を除く): 12470079

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 95189, 285567, 666323, 856701, 1998969, 2570103, 5996907, 17990721]

約数ペア:

[(1, 17990721), (3, 5996907), (7, 2570103), (9, 1998969), (21, 856701), (27, 666323), (63, 285567), (189, 95189)]