20487909

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 31736320

約数和(自身を除く): 11248411

約数列:

[1, 3, 13, 19, 39, 43, 57, 129, 247, 559, 643, 741, 817, 1677, 1929, 2451, 8359, 10621, 12217, 25077, 27649, 31863, 36651, 82947, 158821, 359437, 476463, 525331, 1078311, 1575993, 6829303, 20487909]

約数ペア:

[(1, 20487909), (3, 6829303), (13, 1575993), (19, 1078311), (39, 525331), (43, 476463), (57, 359437), (129, 158821), (247, 82947), (559, 36651), (643, 31863), (741, 27649), (817, 25077), (1677, 12217), (1929, 10621), (2451, 8359)]