664391

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{149}}^1$

素因数の和:183

約数の個数: 16

約数和(自身を含む): 840000

約数和(自身を除く): 175609

約数列:

[1, 7, 13, 49, 91, 149, 343, 637, 1043, 1937, 4459, 7301, 13559, 51107, 94913, 664391]

約数ペア:

[(1, 664391), (7, 94913), (13, 51107), (49, 13559), (91, 7301), (149, 4459), (343, 1937), (637, 1043)]