21798639

素因数分解:

$3^4\times {\mathrm{191}}^1\times {\mathrm{1409}}^1$

素因数の和:1612

約数の個数: 20

約数和(自身を含む): 32757120

約数和(自身を除く): 10958481

約数列:

[1, 3, 9, 27, 81, 191, 573, 1409, 1719, 4227, 5157, 12681, 15471, 38043, 114129, 269119, 807357, 2422071, 7266213, 21798639]

約数ペア:

[(1, 21798639), (3, 7266213), (9, 2422071), (27, 807357), (81, 269119), (191, 114129), (573, 38043), (1409, 15471), (1719, 12681), (4227, 5157)]