21128841

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{197}}^1\times {\mathrm{701}}^1$

素因数の和:921

約数の個数: 24

約数和(自身を含む): 32525064

約数和(自身を除く): 11396223

約数列:

[1, 3, 9, 17, 51, 153, 197, 591, 701, 1773, 2103, 3349, 6309, 10047, 11917, 30141, 35751, 107253, 138097, 414291, 1242873, 2347649, 7042947, 21128841]

約数ペア:

[(1, 21128841), (3, 7042947), (9, 2347649), (17, 1242873), (51, 414291), (153, 138097), (197, 107253), (591, 35751), (701, 30141), (1773, 11917), (2103, 10047), (3349, 6309)]