18990380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23159}}^1$

素因数の和:23209

約数の個数: 24

約数和(自身を含む): 40854240

約数和(自身を除く): 21863860

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 23159, 46318, 92636, 115795, 231590, 463180, 949519, 1899038, 3798076, 4747595, 9495190, 18990380]

約数ペア:

[(1, 18990380), (2, 9495190), (4, 4747595), (5, 3798076), (10, 1899038), (20, 949519), (41, 463180), (82, 231590), (164, 115795), (205, 92636), (410, 46318), (820, 23159)]