81690416

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{50551}}^1$

素因数の和:50660

約数の個数: 20

約数和(自身を含む): 159845424

約数和(自身を除く): 78155008

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 50551, 101102, 202204, 404408, 808816, 5105651, 10211302, 20422604, 40845208, 81690416]

約数ペア:

[(1, 81690416), (2, 40845208), (4, 20422604), (8, 10211302), (16, 5105651), (101, 808816), (202, 404408), (404, 202204), (808, 101102), (1616, 50551)]