20551719

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{1999}}^1$

素因数の和:2174

約数の個数: 16

約数和(自身を含む): 28800000

約数和(自身を除く): 8248281

約数列:

[1, 3, 23, 69, 149, 447, 1999, 3427, 5997, 10281, 45977, 137931, 297851, 893553, 6850573, 20551719]

約数ペア:

[(1, 20551719), (3, 6850573), (23, 893553), (69, 297851), (149, 137931), (447, 45977), (1999, 10281), (3427, 5997)]