21811820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47417}}^1$

素因数の和:47449

約数の個数: 24

約数和(自身を含む): 47797344

約数和(自身を除く): 25985524

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 47417, 94834, 189668, 237085, 474170, 948340, 1090591, 2181182, 4362364, 5452955, 10905910, 21811820]

約数ペア:

[(1, 21811820), (2, 10905910), (4, 5452955), (5, 4362364), (10, 2181182), (20, 1090591), (23, 948340), (46, 474170), (92, 237085), (115, 189668), (230, 94834), (460, 47417)]