20990780

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{36191}}^1$

素因数の和:36229

約数の個数: 24

約数和(自身を含む): 45601920

約数和(自身を除く): 24611140

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 36191, 72382, 144764, 180955, 361910, 723820, 1049539, 2099078, 4198156, 5247695, 10495390, 20990780]

約数ペア:

[(1, 20990780), (2, 10495390), (4, 5247695), (5, 4198156), (10, 2099078), (20, 1049539), (29, 723820), (58, 361910), (116, 180955), (145, 144764), (290, 72382), (580, 36191)]