21210309

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18269}}^1$

素因数の和:18321

約数の個数: 16

約数和(自身を含む): 32155200

約数和(自身を除く): 10944891

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18269, 54807, 164421, 493263, 785567, 2356701, 7070103, 21210309]

約数ペア:

[(1, 21210309), (3, 7070103), (9, 2356701), (27, 785567), (43, 493263), (129, 164421), (387, 54807), (1161, 18269)]