20991800

素因数分解:

$2^3\times 5^2\times {\mathrm{104959}}^1$

素因数の和:104975

約数の個数: 24

約数和(自身を含む): 48806400

約数和(自身を除く): 27814600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 104959, 209918, 419836, 524795, 839672, 1049590, 2099180, 2623975, 4198360, 5247950, 10495900, 20991800]

約数ペア:

[(1, 20991800), (2, 10495900), (4, 5247950), (5, 4198360), (8, 2623975), (10, 2099180), (20, 1049590), (25, 839672), (40, 524795), (50, 419836), (100, 209918), (200, 104959)]