19881268

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{41077}}^1$

素因数の和:41103

約数の個数: 18

約数和(自身を含む): 38243618

約数和(自身を除く): 18362350

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 41077, 82154, 164308, 451847, 903694, 1807388, 4970317, 9940634, 19881268]

約数ペア:

[(1, 19881268), (2, 9940634), (4, 4970317), (11, 1807388), (22, 903694), (44, 451847), (121, 164308), (242, 82154), (484, 41077)]