18658431

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{487}}^1$

素因数の和:553

約数の個数: 40

約数和(自身を含む): 31177344

約数和(自身を除く): 12518913

約数列:

[1, 3, 9, 11, 27, 33, 43, 81, 99, 129, 297, 387, 473, 487, 891, 1161, 1419, 1461, 3483, 4257, 4383, 5357, 12771, 13149, 16071, 20941, 38313, 39447, 48213, 62823, 144639, 188469, 230351, 433917, 565407, 691053, 1696221, 2073159, 6219477, 18658431]

約数ペア:

[(1, 18658431), (3, 6219477), (9, 2073159), (11, 1696221), (27, 691053), (33, 565407), (43, 433917), (81, 230351), (99, 188469), (129, 144639), (297, 62823), (387, 48213), (473, 39447), (487, 38313), (891, 20941), (1161, 16071), (1419, 13149), (1461, 12771), (3483, 5357), (4257, 4383)]