20890287

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{19183}}^1$

素因数の和:19211

約数の個数: 18

約数和(自身を含む): 33169136

約数和(自身を除く): 12278849

約数列:

[1, 3, 9, 11, 33, 99, 121, 363, 1089, 19183, 57549, 172647, 211013, 633039, 1899117, 2321143, 6963429, 20890287]

約数ペア:

[(1, 20890287), (3, 6963429), (9, 2321143), (11, 1899117), (33, 633039), (99, 211013), (121, 172647), (363, 57549), (1089, 19183)]