20641816

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{198479}}^1$

素因数の和:198498

約数の個数: 16

約数和(自身を含む): 41680800

約数和(自身を除く): 21038984

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 198479, 396958, 793916, 1587832, 2580227, 5160454, 10320908, 20641816]

約数ペア:

[(1, 20641816), (2, 10320908), (4, 5160454), (8, 2580227), (13, 1587832), (26, 793916), (52, 396958), (104, 198479)]