20420289

素因数分解:

$3^3\times {\mathrm{31}}^2\times {\mathrm{787}}^1$

素因数の和:858

約数の個数: 24

約数和(自身を含む): 31299360

約数和(自身を除く): 10879071

約数列:

[1, 3, 9, 27, 31, 93, 279, 787, 837, 961, 2361, 2883, 7083, 8649, 21249, 24397, 25947, 73191, 219573, 658719, 756307, 2268921, 6806763, 20420289]

約数ペア:

[(1, 20420289), (3, 6806763), (9, 2268921), (27, 756307), (31, 658719), (93, 219573), (279, 73191), (787, 25947), (837, 24397), (961, 21249), (2361, 8649), (2883, 7083)]