18919312

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 38006496

約数和(自身を除く): 19087184

約数列:

[1, 2, 4, 8, 16, 43, 86, 107, 172, 214, 257, 344, 428, 514, 688, 856, 1028, 1712, 2056, 4112, 4601, 9202, 11051, 18404, 22102, 27499, 36808, 44204, 54998, 73616, 88408, 109996, 176816, 219992, 439984, 1182457, 2364914, 4729828, 9459656, 18919312]

約数ペア:

[(1, 18919312), (2, 9459656), (4, 4729828), (8, 2364914), (16, 1182457), (43, 439984), (86, 219992), (107, 176816), (172, 109996), (214, 88408), (257, 73616), (344, 54998), (428, 44204), (514, 36808), (688, 27499), (856, 22102), (1028, 18404), (1712, 11051), (2056, 9202), (4112, 4601)]