81123418

素因数分解:

$2^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2301

約数の個数: 16

約数和(自身を含む): 123552000

約数和(自身を除く): 42428582

約数列:

[1, 2, 103, 197, 206, 394, 1999, 3998, 20291, 40582, 205897, 393803, 411794, 787606, 40561709, 81123418]

約数ペア:

[(1, 81123418), (2, 40561709), (103, 787606), (197, 411794), (206, 393803), (394, 205897), (1999, 40582), (3998, 20291)]