18902020

素因数分解:

$2^2\times 5^1\times {\mathrm{769}}^1\times {\mathrm{1229}}^1$

素因数の和:2007

約数の個数: 24

約数和(自身を含む): 39778200

約数和(自身を除く): 20876180

約数列:

[1, 2, 4, 5, 10, 20, 769, 1229, 1538, 2458, 3076, 3845, 4916, 6145, 7690, 12290, 15380, 24580, 945101, 1890202, 3780404, 4725505, 9451010, 18902020]

約数ペア:

[(1, 18902020), (2, 9451010), (4, 4725505), (5, 3780404), (10, 1890202), (20, 945101), (769, 24580), (1229, 15380), (1538, 12290), (2458, 7690), (3076, 6145), (3845, 4916)]