20580273

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 35582976

約数和(自身を除く): 15002703

約数列:

[1, 3, 7, 9, 21, 43, 63, 71, 107, 129, 213, 301, 321, 387, 497, 639, 749, 903, 963, 1491, 2247, 2709, 3053, 4473, 4601, 6741, 7597, 9159, 13803, 21371, 22791, 27477, 32207, 41409, 53179, 64113, 68373, 96621, 159537, 192339, 289863, 326671, 478611, 980013, 2286697, 2940039, 6860091, 20580273]

約数ペア:

[(1, 20580273), (3, 6860091), (7, 2940039), (9, 2286697), (21, 980013), (43, 478611), (63, 326671), (71, 289863), (107, 192339), (129, 159537), (213, 96621), (301, 68373), (321, 64113), (387, 53179), (497, 41409), (639, 32207), (749, 27477), (903, 22791), (963, 21371), (1491, 13803), (2247, 9159), (2709, 7597), (3053, 6741), (4473, 4601)]