21708765

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{863}}^1$

素因数の和:930

約数の個数: 48

約数和(自身を含む): 41513472

約数和(自身を除く): 19804707

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 117, 129, 195, 215, 387, 559, 585, 645, 863, 1677, 1935, 2589, 2795, 4315, 5031, 7767, 8385, 11219, 12945, 25155, 33657, 37109, 38835, 56095, 100971, 111327, 168285, 185545, 333981, 482417, 504855, 556635, 1447251, 1669905, 2412085, 4341753, 7236255, 21708765]

約数ペア:

[(1, 21708765), (3, 7236255), (5, 4341753), (9, 2412085), (13, 1669905), (15, 1447251), (39, 556635), (43, 504855), (45, 482417), (65, 333981), (117, 185545), (129, 168285), (195, 111327), (215, 100971), (387, 56095), (559, 38835), (585, 37109), (645, 33657), (863, 25155), (1677, 12945), (1935, 11219), (2589, 8385), (2795, 7767), (4315, 5031)]