18917919

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:439

約数の個数: 24

約数和(自身を含む): 28058160

約数和(自身を除く): 9140241

約数列:

[1, 3, 9, 67, 137, 201, 229, 411, 603, 687, 1233, 2061, 9179, 15343, 27537, 31373, 46029, 82611, 94119, 138087, 282357, 2101991, 6305973, 18917919]

約数ペア:

[(1, 18917919), (3, 6305973), (9, 2101991), (67, 282357), (137, 138087), (201, 94119), (229, 82611), (411, 46029), (603, 31373), (687, 27537), (1233, 15343), (2061, 9179)]