21211578

素因数分解:

$2^1\times 3^3\times {\mathrm{392807}}^1$

素因数の和:392818

約数の個数: 16

約数和(自身を含む): 47136960

約数和(自身を除く): 25925382

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 392807, 785614, 1178421, 2356842, 3535263, 7070526, 10605789, 21211578]

約数ペア:

[(1, 21211578), (2, 10605789), (3, 7070526), (6, 3535263), (9, 2356842), (18, 1178421), (27, 785614), (54, 392807)]