20128988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{10639}}^1$

素因数の和:10697

約数の個数: 24

約数和(自身を含む): 39325440

約数和(自身を除く): 19196452

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1892, 10639, 21278, 42556, 117029, 234058, 457477, 468116, 914954, 1829908, 5032247, 10064494, 20128988]

約数ペア:

[(1, 20128988), (2, 10064494), (4, 5032247), (11, 1829908), (22, 914954), (43, 468116), (44, 457477), (86, 234058), (172, 117029), (473, 42556), (946, 21278), (1892, 10639)]