21974121

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{293}}^1\times {\mathrm{641}}^1$

素因数の和:953

約数の個数: 24

約数和(自身を含む): 34352136

約数和(自身を除く): 12378015

約数列:

[1, 3, 9, 13, 39, 117, 293, 641, 879, 1923, 2637, 3809, 5769, 8333, 11427, 24999, 34281, 74997, 187813, 563439, 1690317, 2441569, 7324707, 21974121]

約数ペア:

[(1, 21974121), (3, 7324707), (9, 2441569), (13, 1690317), (39, 563439), (117, 187813), (293, 74997), (641, 34281), (879, 24999), (1923, 11427), (2637, 8333), (3809, 5769)]