18913378

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{19993}}^1$

素因数の和:20049

約数の個数: 16

約数和(自身を含む): 31670496

約数和(自身を除く): 12757118

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 19993, 39986, 219923, 439846, 859699, 1719398, 9456689, 18913378]

約数ペア:

[(1, 18913378), (2, 9456689), (11, 1719398), (22, 859699), (43, 439846), (86, 219923), (473, 39986), (946, 19993)]