21985337

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:245

約数の個数: 24

約数和(自身を含む): 25982880

約数和(自身を除く): 3997543

約数列:

[1, 11, 19, 73, 121, 131, 209, 803, 1387, 1441, 2299, 2489, 8833, 9563, 15257, 15851, 27379, 105193, 167827, 181697, 301169, 1157123, 1998667, 21985337]

約数ペア:

[(1, 21985337), (11, 1998667), (19, 1157123), (73, 301169), (121, 181697), (131, 167827), (209, 105193), (803, 27379), (1387, 15851), (1441, 15257), (2299, 9563), (2489, 8833)]