18881648

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:425

約数の個数: 40

約数和(自身を含む): 37966320

約数和(自身を除く): 19084672

約数列:

[1, 2, 4, 8, 16, 41, 82, 107, 164, 214, 269, 328, 428, 538, 656, 856, 1076, 1712, 2152, 4304, 4387, 8774, 11029, 17548, 22058, 28783, 35096, 44116, 57566, 70192, 88232, 115132, 176464, 230264, 460528, 1180103, 2360206, 4720412, 9440824, 18881648]

約数ペア:

[(1, 18881648), (2, 9440824), (4, 4720412), (8, 2360206), (16, 1180103), (41, 460528), (82, 230264), (107, 176464), (164, 115132), (214, 88232), (269, 70192), (328, 57566), (428, 44116), (538, 35096), (656, 28783), (856, 22058), (1076, 17548), (1712, 11029), (2152, 8774), (4304, 4387)]