20509311

素因数分解:

$3^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 27820800

約数和(自身を除く): 7311489

約数列:

[1, 3, 137, 139, 359, 411, 417, 1077, 19043, 49183, 49901, 57129, 147549, 149703, 6836437, 20509311]

約数ペア:

[(1, 20509311), (3, 6836437), (137, 149703), (139, 147549), (359, 57129), (411, 49901), (417, 49183), (1077, 19043)]