1621395

素因数分解:

$3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{263}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 2841696

約数和(自身を除く): 1220301

約数列:

[1, 3, 5, 9, 15, 45, 137, 263, 411, 685, 789, 1233, 1315, 2055, 2367, 3945, 6165, 11835, 36031, 108093, 180155, 324279, 540465, 1621395]

約数ペア:

[(1, 1621395), (3, 540465), (5, 324279), (9, 180155), (15, 108093), (45, 36031), (137, 11835), (263, 6165), (411, 3945), (685, 2367), (789, 2055), (1233, 1315)]