18720394

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:331

約数の個数: 48

約数和(自身を含む): 36235584

約数和(自身を除く): 17515190

約数列:

[1, 2, 7, 11, 14, 22, 43, 77, 86, 121, 154, 242, 257, 301, 473, 514, 602, 847, 946, 1694, 1799, 2827, 3311, 3598, 5203, 5654, 6622, 10406, 11051, 19789, 22102, 31097, 36421, 39578, 62194, 72842, 77357, 121561, 154714, 217679, 243122, 435358, 850927, 1337171, 1701854, 2674342, 9360197, 18720394]

約数ペア:

[(1, 18720394), (2, 9360197), (7, 2674342), (11, 1701854), (14, 1337171), (22, 850927), (43, 435358), (77, 243122), (86, 217679), (121, 154714), (154, 121561), (242, 77357), (257, 72842), (301, 62194), (473, 39578), (514, 36421), (602, 31097), (847, 22102), (946, 19789), (1694, 11051), (1799, 10406), (2827, 6622), (3311, 5654), (3598, 5203)]