21195818

素因数分解:

$2^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{257}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 37597824

約数和(自身を除く): 16402006

約数列:

[1, 2, 7, 14, 43, 86, 137, 257, 274, 301, 514, 602, 959, 1799, 1918, 3598, 5891, 11051, 11782, 22102, 35209, 41237, 70418, 77357, 82474, 154714, 246463, 492926, 1513987, 3027974, 10597909, 21195818]

約数ペア:

[(1, 21195818), (2, 10597909), (7, 3027974), (14, 1513987), (43, 492926), (86, 246463), (137, 154714), (257, 82474), (274, 77357), (301, 70418), (514, 41237), (602, 35209), (959, 22102), (1799, 11782), (1918, 11051), (3598, 5891)]