18720218

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{27449}}^1$

素因数の和:27493

約数の個数: 16

約数和(自身を含む): 31622400

約数和(自身を除く): 12902182

約数列:

[1, 2, 11, 22, 31, 62, 341, 682, 27449, 54898, 301939, 603878, 850919, 1701838, 9360109, 18720218]

約数ペア:

[(1, 18720218), (2, 9360109), (11, 1701838), (22, 850919), (31, 603878), (62, 301939), (341, 54898), (682, 27449)]