21631291

素因数分解:

${\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{97}}^2$

素因数の和:235

約数の個数: 18

約数和(自身を含む): 25288620

約数和(自身を除く): 3657329

約数列:

[1, 11, 19, 97, 121, 209, 1067, 1843, 2299, 9409, 11737, 20273, 103499, 178771, 223003, 1138489, 1966481, 21631291]

約数ペア:

[(1, 21631291), (11, 1966481), (19, 1138489), (97, 223003), (121, 178771), (209, 103499), (1067, 20273), (1843, 11737), (2299, 9409)]