210005991

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{138071}}^1$

素因数の和:138103

約数の個数: 18

約数和(自身を含む): 328473288

約数和(自身を除く): 118467297

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 138071, 414213, 1242639, 1794923, 5384769, 16154307, 23333999, 70001997, 210005991]

約数ペア:

[(1, 210005991), (3, 70001997), (9, 23333999), (13, 16154307), (39, 5384769), (117, 1794923), (169, 1242639), (507, 414213), (1521, 138071)]