19980290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181639}}^1$

素因数の和:181657

約数の個数: 16

約数和(自身を含む): 39234240

約数和(自身を除く): 19253950

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 181639, 363278, 908195, 1816390, 1998029, 3996058, 9990145, 19980290]

約数ペア:

[(1, 19980290), (2, 9990145), (5, 3996058), (10, 1998029), (11, 1816390), (22, 908195), (55, 363278), (110, 181639)]