19982007

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{257}}^1$

素因数の和:479

約数の個数: 24

約数和(自身を含む): 29703024

約数和(自身を除く): 9721017

約数列:

[1, 3, 9, 53, 159, 163, 257, 477, 489, 771, 1467, 2313, 8639, 13621, 25917, 40863, 41891, 77751, 122589, 125673, 377019, 2220223, 6660669, 19982007]

約数ペア:

[(1, 19982007), (3, 6660669), (9, 2220223), (53, 377019), (159, 125673), (163, 122589), (257, 77751), (477, 41891), (489, 40863), (771, 25917), (1467, 13621), (2313, 8639)]