21438639

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{1787}}^1$

素因数の和:1867

約数の個数: 24

約数和(自身を含む): 32727552

約数和(自身を除く): 11288913

約数列:

[1, 3, 9, 31, 43, 93, 129, 279, 387, 1333, 1787, 3999, 5361, 11997, 16083, 55397, 76841, 166191, 230523, 498573, 691569, 2382071, 7146213, 21438639]

約数ペア:

[(1, 21438639), (3, 7146213), (9, 2382071), (31, 691569), (43, 498573), (93, 230523), (129, 166191), (279, 76841), (387, 55397), (1333, 16083), (1787, 11997), (3999, 5361)]