18986838

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{243421}}^1$

素因数の和:243439

約数の個数: 16

約数和(自身を含む): 40894896

約数和(自身を除く): 21908058

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 243421, 486842, 730263, 1460526, 3164473, 6328946, 9493419, 18986838]

約数ペア:

[(1, 18986838), (2, 9493419), (3, 6328946), (6, 3164473), (13, 1460526), (26, 730263), (39, 486842), (78, 243421)]