81209684

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{495181}}^1$

素因数の和:495226

約数の個数: 12

約数和(自身を含む): 145583508

約数和(自身を除く): 64373824

約数列:

[1, 2, 4, 41, 82, 164, 495181, 990362, 1980724, 20302421, 40604842, 81209684]

約数ペア:

[(1, 81209684), (2, 40604842), (4, 20302421), (41, 1980724), (82, 990362), (164, 495181)]