81280016

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{163871}}^1$

素因数の和:163910

約数の個数: 20

約数和(自身を含む): 162561024

約数和(自身を除く): 81281008

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 163871, 327742, 655484, 1310968, 2621936, 5080001, 10160002, 20320004, 40640008, 81280016]

約数ペア:

[(1, 81280016), (2, 40640008), (4, 20320004), (8, 10160002), (16, 5080001), (31, 2621936), (62, 1310968), (124, 655484), (248, 327742), (496, 163871)]