20478788

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{1811}}^1$

素因数の和:2083

約数の個数: 24

約数和(自身を含む): 39269664

約数和(自身を除く): 18790876

約数列:

[1, 2, 4, 11, 22, 44, 257, 514, 1028, 1811, 2827, 3622, 5654, 7244, 11308, 19921, 39842, 79684, 465427, 930854, 1861708, 5119697, 10239394, 20478788]

約数ペア:

[(1, 20478788), (2, 10239394), (4, 5119697), (11, 1861708), (22, 930854), (44, 465427), (257, 79684), (514, 39842), (1028, 19921), (1811, 11308), (2827, 7244), (3622, 5654)]