19989860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90863}}^1$

素因数の和:90883

約数の個数: 24

約数和(自身を含む): 45795456

約数和(自身を除く): 25805596

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90863, 181726, 363452, 454315, 908630, 999493, 1817260, 1998986, 3997972, 4997465, 9994930, 19989860]

約数ペア:

[(1, 19989860), (2, 9994930), (4, 4997465), (5, 3997972), (10, 1998986), (11, 1817260), (20, 999493), (22, 908630), (44, 454315), (55, 363452), (110, 181726), (220, 90863)]