18428956

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{257}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 40049856

約数和(自身を除く): 21620900

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 197, 257, 364, 394, 514, 788, 1028, 1379, 1799, 2561, 2758, 3341, 3598, 5122, 5516, 6682, 7196, 10244, 13364, 17927, 23387, 35854, 46774, 50629, 71708, 93548, 101258, 202516, 354403, 658177, 708806, 1316354, 1417612, 2632708, 4607239, 9214478, 18428956]

約数ペア:

[(1, 18428956), (2, 9214478), (4, 4607239), (7, 2632708), (13, 1417612), (14, 1316354), (26, 708806), (28, 658177), (52, 354403), (91, 202516), (182, 101258), (197, 93548), (257, 71708), (364, 50629), (394, 46774), (514, 35854), (788, 23387), (1028, 17927), (1379, 13364), (1799, 10244), (2561, 7196), (2758, 6682), (3341, 5516), (3598, 5122)]