20689966

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{21871}}^1$

素因数の和:21927

約数の個数: 16

約数和(自身を含む): 34645248

約数和(自身を除く): 13955282

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 21871, 43742, 240581, 481162, 940453, 1880906, 10344983, 20689966]

約数ペア:

[(1, 20689966), (2, 10344983), (11, 1880906), (22, 940453), (43, 481162), (86, 240581), (473, 43742), (946, 21871)]