648261

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:265

約数の個数: 24

約数和(自身を含む): 1048320

約数和(自身を除く): 400059

約数列:

[1, 3, 9, 17, 19, 51, 57, 153, 171, 223, 323, 669, 969, 2007, 2907, 3791, 4237, 11373, 12711, 34119, 38133, 72029, 216087, 648261]

約数ペア:

[(1, 648261), (3, 216087), (9, 72029), (17, 38133), (19, 34119), (51, 12711), (57, 11373), (153, 4237), (171, 3791), (223, 2907), (323, 2007), (669, 969)]