19998999

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1667}}^1$

素因数の和:1747

約数の個数: 24

約数和(自身を含む): 30531072

約数和(自身を除く): 10532073

約数列:

[1, 3, 9, 31, 43, 93, 129, 279, 387, 1333, 1667, 3999, 5001, 11997, 15003, 51677, 71681, 155031, 215043, 465093, 645129, 2222111, 6666333, 19998999]

約数ペア:

[(1, 19998999), (3, 6666333), (9, 2222111), (31, 645129), (43, 465093), (93, 215043), (129, 155031), (279, 71681), (387, 51677), (1333, 15003), (1667, 11997), (3999, 5001)]