19991290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181739}}^1$

素因数の和:181757

約数の個数: 16

約数和(自身を含む): 39255840

約数和(自身を除く): 19264550

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 181739, 363478, 908695, 1817390, 1999129, 3998258, 9995645, 19991290]

約数ペア:

[(1, 19991290), (2, 9995645), (5, 3998258), (10, 1999129), (11, 1817390), (22, 908695), (55, 363478), (110, 181739)]