90040900

素因数分解:

$2^2\times 5^2\times {\mathrm{900409}}^1$

素因数の和:900423

約数の個数: 18

約数和(自身を含む): 195388970

約数和(自身を除く): 105348070

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 900409, 1800818, 3601636, 4502045, 9004090, 18008180, 22510225, 45020450, 90040900]

約数ペア:

[(1, 90040900), (2, 45020450), (4, 22510225), (5, 18008180), (10, 9004090), (20, 4502045), (25, 3601636), (50, 1800818), (100, 900409)]