20404978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{491}}^1\times {\mathrm{1889}}^1$

素因数の和:2393

約数の個数: 16

約数和(自身を含む): 33475680

約数和(自身を除く): 13070702

約数列:

[1, 2, 11, 22, 491, 982, 1889, 3778, 5401, 10802, 20779, 41558, 927499, 1854998, 10202489, 20404978]

約数ペア:

[(1, 20404978), (2, 10202489), (11, 1854998), (22, 927499), (491, 41558), (982, 20779), (1889, 10802), (3778, 5401)]