21855987

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5741}}^1$

素因数の和:5800

約数の個数: 20

約数和(自身を含む): 33349536

約数和(自身を除く): 11493549

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5741, 17223, 51669, 155007, 269827, 465021, 809481, 2428443, 7285329, 21855987]

約数ペア:

[(1, 21855987), (3, 7285329), (9, 2428443), (27, 809481), (47, 465021), (81, 269827), (141, 155007), (423, 51669), (1269, 17223), (3807, 5741)]