21890907

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{409}}^1$

素因数の和:747

約数の個数: 24

約数和(自身を含む): 33472400

約数和(自身を除く): 11581493

約数列:

[1, 3, 9, 19, 57, 171, 313, 409, 939, 1227, 2817, 3681, 5947, 7771, 17841, 23313, 53523, 69939, 128017, 384051, 1152153, 2432323, 7296969, 21890907]

約数ペア:

[(1, 21890907), (3, 7296969), (9, 2432323), (19, 1152153), (57, 384051), (171, 128017), (313, 69939), (409, 53523), (939, 23313), (1227, 17841), (2817, 7771), (3681, 5947)]