19886481

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{2203}}^1$

素因数の和:2285

約数の個数: 24

約数和(自身を含む): 30944160

約数和(自身を除く): 11057679

約数列:

[1, 3, 9, 17, 51, 59, 153, 177, 531, 1003, 2203, 3009, 6609, 9027, 19827, 37451, 112353, 129977, 337059, 389931, 1169793, 2209609, 6628827, 19886481]

約数ペア:

[(1, 19886481), (3, 6628827), (9, 2209609), (17, 1169793), (51, 389931), (59, 337059), (153, 129977), (177, 112353), (531, 37451), (1003, 19827), (2203, 9027), (3009, 6609)]