20991333

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{33479}}^1$

素因数の和:33512

約数の個数: 16

約数和(自身を含む): 32140800

約数和(自身を除く): 11149467

約数列:

[1, 3, 11, 19, 33, 57, 209, 627, 33479, 100437, 368269, 636101, 1104807, 1908303, 6997111, 20991333]

約数ペア:

[(1, 20991333), (3, 6997111), (11, 1908303), (19, 1104807), (33, 636101), (57, 368269), (209, 100437), (627, 33479)]