81091600

素因数分解:

$2^4\times 5^2\times {\mathrm{202729}}^1$

素因数の和:202747

約数の個数: 30

約数和(自身を含む): 194823530

約数和(自身を除く): 113731930

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 202729, 405458, 810916, 1013645, 1621832, 2027290, 3243664, 4054580, 5068225, 8109160, 10136450, 16218320, 20272900, 40545800, 81091600]

約数ペア:

[(1, 81091600), (2, 40545800), (4, 20272900), (5, 16218320), (8, 10136450), (10, 8109160), (16, 5068225), (20, 4054580), (25, 3243664), (40, 2027290), (50, 1621832), (80, 1013645), (100, 810916), (200, 405458), (400, 202729)]