21197488

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{457}}^1$

素因数の和:701

約数の個数: 40

約数和(自身を含む): 44524928

約数和(自身を除く): 23327440

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 223, 446, 457, 892, 914, 1784, 1828, 2899, 3568, 3656, 5798, 5941, 7312, 11596, 11882, 23192, 23764, 46384, 47528, 95056, 101911, 203822, 407644, 815288, 1324843, 1630576, 2649686, 5299372, 10598744, 21197488]

約数ペア:

[(1, 21197488), (2, 10598744), (4, 5299372), (8, 2649686), (13, 1630576), (16, 1324843), (26, 815288), (52, 407644), (104, 203822), (208, 101911), (223, 95056), (446, 47528), (457, 46384), (892, 23764), (914, 23192), (1784, 11882), (1828, 11596), (2899, 7312), (3568, 5941), (3656, 5798)]