81291231

素因数分解:

$3^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{9283}}^1$

素因数の和:9435

約数の個数: 24

約数和(自身を含む): 135175040

約数和(自身を除く): 53883809

約数列:

[1, 3, 7, 9, 21, 63, 139, 417, 973, 1251, 2919, 8757, 9283, 27849, 64981, 83547, 194943, 584829, 1290337, 3871011, 9032359, 11613033, 27097077, 81291231]

約数ペア:

[(1, 81291231), (3, 27097077), (7, 11613033), (9, 9032359), (21, 3871011), (63, 1290337), (139, 584829), (417, 194943), (973, 83547), (1251, 64981), (2919, 27849), (8757, 9283)]