2720223

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 40

約数和(自身を含む): 4599936

約数和(自身を除く): 1879713

約数列:

[1, 3, 9, 11, 27, 33, 43, 71, 81, 99, 129, 213, 297, 387, 473, 639, 781, 891, 1161, 1419, 1917, 2343, 3053, 3483, 4257, 5751, 7029, 9159, 12771, 21087, 27477, 33583, 38313, 63261, 82431, 100749, 247293, 302247, 906741, 2720223]

約数ペア:

[(1, 2720223), (3, 906741), (9, 302247), (11, 247293), (27, 100749), (33, 82431), (43, 63261), (71, 38313), (81, 33583), (99, 27477), (129, 21087), (213, 12771), (297, 9159), (387, 7029), (473, 5751), (639, 4257), (781, 3483), (891, 3053), (1161, 2343), (1419, 1917)]