21153015

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{709}}^1$

素因数の和:753

約数の個数: 64

約数和(自身を含む): 42940800

約数和(自身を除く): 21787785

約数列:

[1, 3, 5, 9, 13, 15, 17, 27, 39, 45, 51, 65, 85, 117, 135, 153, 195, 221, 255, 351, 459, 585, 663, 709, 765, 1105, 1755, 1989, 2127, 2295, 3315, 3545, 5967, 6381, 9217, 9945, 10635, 12053, 19143, 27651, 29835, 31905, 36159, 46085, 60265, 82953, 95715, 108477, 138255, 156689, 180795, 248859, 325431, 414765, 470067, 542385, 783445, 1244295, 1410201, 1627155, 2350335, 4230603, 7051005, 21153015]

約数ペア:

[(1, 21153015), (3, 7051005), (5, 4230603), (9, 2350335), (13, 1627155), (15, 1410201), (17, 1244295), (27, 783445), (39, 542385), (45, 470067), (51, 414765), (65, 325431), (85, 248859), (117, 180795), (135, 156689), (153, 138255), (195, 108477), (221, 95715), (255, 82953), (351, 60265), (459, 46085), (585, 36159), (663, 31905), (709, 29835), (765, 27651), (1105, 19143), (1755, 12053), (1989, 10635), (2127, 9945), (2295, 9217), (3315, 6381), (3545, 5967)]