21655180

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5441}}^1$

素因数の和:5649

約数の個数: 24

約数和(自身を含む): 45712800

約数和(自身を除く): 24057620

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5441, 10882, 21764, 27205, 54410, 108820, 1082759, 2165518, 4331036, 5413795, 10827590, 21655180]

約数ペア:

[(1, 21655180), (2, 10827590), (4, 5413795), (5, 4331036), (10, 2165518), (20, 1082759), (199, 108820), (398, 54410), (796, 27205), (995, 21764), (1990, 10882), (3980, 5441)]