18870878

素因数分解:

$2^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{1801}}^1$

素因数の和:1860

約数の個数: 24

約数和(自身を含む): 31657536

約数和(自身を除く): 12786658

約数列:

[1, 2, 13, 26, 31, 62, 169, 338, 403, 806, 1801, 3602, 5239, 10478, 23413, 46826, 55831, 111662, 304369, 608738, 725803, 1451606, 9435439, 18870878]

約数ペア:

[(1, 18870878), (2, 9435439), (13, 1451606), (26, 725803), (31, 608738), (62, 304369), (169, 111662), (338, 55831), (403, 46826), (806, 23413), (1801, 10478), (3602, 5239)]