19881081

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{491}}^1$

素因数の和:917

約数の個数: 24

約数和(自身を含む): 31468320

約数和(自身を除く): 11587239

約数列:

[1, 3, 9, 11, 33, 99, 409, 491, 1227, 1473, 3681, 4419, 4499, 5401, 13497, 16203, 40491, 48609, 200819, 602457, 1807371, 2209009, 6627027, 19881081]

約数ペア:

[(1, 19881081), (3, 6627027), (9, 2209009), (11, 1807371), (33, 602457), (99, 200819), (409, 48609), (491, 40491), (1227, 16203), (1473, 13497), (3681, 5401), (4419, 4499)]