19999257

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1\times {\mathrm{677}}^1$

素因数の和:952

約数の個数: 16

約数和(自身を含む): 27445440

約数和(自身を除く): 7446183

約数列:

[1, 3, 43, 129, 229, 677, 687, 2031, 9847, 29111, 29541, 87333, 155033, 465099, 6666419, 19999257]

約数ペア:

[(1, 19999257), (3, 6666419), (43, 465099), (129, 155033), (229, 87333), (677, 29541), (687, 29111), (2031, 9847)]