21581883

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{5669}}^1$

素因数の和:5728

約数の個数: 20

約数和(自身を含む): 32931360

約数和(自身を除く): 11349477

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 5669, 17007, 51021, 153063, 266443, 459189, 799329, 2397987, 7193961, 21581883]

約数ペア:

[(1, 21581883), (3, 7193961), (9, 2397987), (27, 799329), (47, 459189), (81, 266443), (141, 153063), (423, 51021), (1269, 17007), (3807, 5669)]