81386864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{391283}}^1$

素因数の和:391304

約数の個数: 20

約数和(自身を含む): 169817256

約数和(自身を除く): 88430392

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 391283, 782566, 1565132, 3130264, 5086679, 6260528, 10173358, 20346716, 40693432, 81386864]

約数ペア:

[(1, 81386864), (2, 40693432), (4, 20346716), (8, 10173358), (13, 6260528), (16, 5086679), (26, 3130264), (52, 1565132), (104, 782566), (208, 391283)]