19990399

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3251}}^1$

素因数の和:3318

約数の個数: 16

約数和(自身を含む): 24038784

約数和(自身を除く): 4048385

約数列:

[1, 11, 13, 43, 143, 473, 559, 3251, 6149, 35761, 42263, 139793, 464893, 1537723, 1817309, 19990399]

約数ペア:

[(1, 19990399), (11, 1817309), (13, 1537723), (43, 464893), (143, 139793), (473, 42263), (559, 35761), (3251, 6149)]