18278020

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1289}}^1$

素因数の和:2007

約数の個数: 24

約数和(自身を含む): 38467800

約数和(自身を除く): 20189780

約数列:

[1, 2, 4, 5, 10, 20, 709, 1289, 1418, 2578, 2836, 3545, 5156, 6445, 7090, 12890, 14180, 25780, 913901, 1827802, 3655604, 4569505, 9139010, 18278020]

約数ペア:

[(1, 18278020), (2, 9139010), (4, 4569505), (5, 3655604), (10, 1827802), (20, 913901), (709, 25780), (1289, 14180), (1418, 12890), (2578, 7090), (2836, 6445), (3545, 5156)]