21520838

素因数分解:

$2^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1\times {\mathrm{661}}^1$

素因数の和:959

約数の個数: 16

約数和(自身を含む): 32919936

約数和(自身を除く): 11399098

約数列:

[1, 2, 73, 146, 223, 446, 661, 1322, 16279, 32558, 48253, 96506, 147403, 294806, 10760419, 21520838]

約数ペア:

[(1, 21520838), (2, 10760419), (73, 294806), (146, 147403), (223, 96506), (446, 48253), (661, 32558), (1322, 16279)]