21636040

素因数分解:

$2^3\times 5^1\times {\mathrm{540901}}^1$

素因数の和:540912

約数の個数: 16

約数和(自身を含む): 48681180

約数和(自身を除く): 27045140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 540901, 1081802, 2163604, 2704505, 4327208, 5409010, 10818020, 21636040]

約数ペア:

[(1, 21636040), (2, 10818020), (4, 5409010), (5, 4327208), (8, 2704505), (10, 2163604), (20, 1081802), (40, 540901)]