21123456

素因数分解:

$2^7\times 3^1\times {\mathrm{55009}}^1$

素因数の和:55026

約数の個数: 32

約数和(自身を含む): 56110200

約数和(自身を除く): 34986744

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 384, 55009, 110018, 165027, 220036, 330054, 440072, 660108, 880144, 1320216, 1760288, 2640432, 3520576, 5280864, 7041152, 10561728, 21123456]

約数ペア:

[(1, 21123456), (2, 10561728), (3, 7041152), (4, 5280864), (6, 3520576), (8, 2640432), (12, 1760288), (16, 1320216), (24, 880144), (32, 660108), (48, 440072), (64, 330054), (96, 220036), (128, 165027), (192, 110018), (384, 55009)]