19994985

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{4003}}^1$

素因数の和:4054

約数の個数: 32

約数和(自身を含む): 36516480

約数和(自身を除く): 16521495

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 111, 135, 185, 333, 555, 999, 1665, 4003, 4995, 12009, 20015, 36027, 60045, 108081, 148111, 180135, 444333, 540405, 740555, 1332999, 2221665, 3998997, 6664995, 19994985]

約数ペア:

[(1, 19994985), (3, 6664995), (5, 3998997), (9, 2221665), (15, 1332999), (27, 740555), (37, 540405), (45, 444333), (111, 180135), (135, 148111), (185, 108081), (333, 60045), (555, 36027), (999, 20015), (1665, 12009), (4003, 4995)]