21811640

素因数分解:

$2^3\times 5^1\times {\mathrm{545291}}^1$

素因数の和:545302

約数の個数: 16

約数和(自身を含む): 49076280

約数和(自身を除く): 27264640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 545291, 1090582, 2181164, 2726455, 4362328, 5452910, 10905820, 21811640]

約数ペア:

[(1, 21811640), (2, 10905820), (4, 5452910), (5, 4362328), (8, 2726455), (10, 2181164), (20, 1090582), (40, 545291)]