21000438

素因数分解:

$2^1\times 3^3\times {\mathrm{388897}}^1$

素因数の和:388908

約数の個数: 16

約数和(自身を含む): 46667760

約数和(自身を除く): 25667322

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 388897, 777794, 1166691, 2333382, 3500073, 7000146, 10500219, 21000438]

約数ペア:

[(1, 21000438), (2, 10500219), (3, 7000146), (6, 3500073), (9, 2333382), (18, 1166691), (27, 777794), (54, 388897)]