18720824

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{54421}}^1$

素因数の和:54470

約数の個数: 16

約数和(自身を含む): 35918520

約数和(自身を除く): 17197696

約数列:

[1, 2, 4, 8, 43, 86, 172, 344, 54421, 108842, 217684, 435368, 2340103, 4680206, 9360412, 18720824]

約数ペア:

[(1, 18720824), (2, 9360412), (4, 4680206), (8, 2340103), (43, 435368), (86, 217684), (172, 108842), (344, 54421)]