20390686

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{12479}}^1$

素因数の和:12543

約数の個数: 16

約数和(自身を含む): 32947200

約数和(自身を除く): 12556514

約数列:

[1, 2, 19, 38, 43, 86, 817, 1634, 12479, 24958, 237101, 474202, 536597, 1073194, 10195343, 20390686]

約数ペア:

[(1, 20390686), (2, 10195343), (19, 1073194), (38, 536597), (43, 474202), (86, 237101), (817, 24958), (1634, 12479)]