18918220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23071}}^1$

素因数の和:23121

約数の個数: 24

約数和(自身を含む): 40699008

約数和(自身を除く): 21780788

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23071, 46142, 92284, 115355, 230710, 461420, 945911, 1891822, 3783644, 4729555, 9459110, 18918220]

約数ペア:

[(1, 18918220), (2, 9459110), (4, 4729555), (5, 3783644), (10, 1891822), (20, 945911), (41, 461420), (82, 230710), (164, 115355), (205, 92284), (410, 46142), (820, 23071)]