21028329

素因数分解:

$3^4\times 7^1\times {\mathrm{37087}}^1$

素因数の和:37106

約数の個数: 20

約数和(自身を含む): 35901184

約数和(自身を除く): 14872855

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37087, 111261, 259609, 333783, 778827, 1001349, 2336481, 3004047, 7009443, 21028329]

約数ペア:

[(1, 21028329), (3, 7009443), (7, 3004047), (9, 2336481), (21, 1001349), (27, 778827), (63, 333783), (81, 259609), (189, 111261), (567, 37087)]