21162405

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128257}}^1$

素因数の和:128276

約数の個数: 16

約数和(自身を含む): 36938304

約数和(自身を除く): 15775899

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128257, 384771, 641285, 1410827, 1923855, 4232481, 7054135, 21162405]

約数ペア:

[(1, 21162405), (3, 7054135), (5, 4232481), (11, 1923855), (15, 1410827), (33, 641285), (55, 384771), (165, 128257)]