19997982

素因数分解:

$2^1\times 3^3\times {\mathrm{37}}^1\times {\mathrm{10009}}^1$

素因数の和:10057

約数の個数: 32

約数和(自身を含む): 45645600

約数和(自身を除く): 25647618

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1998, 10009, 20018, 30027, 60054, 90081, 180162, 270243, 370333, 540486, 740666, 1110999, 2221998, 3332997, 6665994, 9998991, 19997982]

約数ペア:

[(1, 19997982), (2, 9998991), (3, 6665994), (6, 3332997), (9, 2221998), (18, 1110999), (27, 740666), (37, 540486), (54, 370333), (74, 270243), (111, 180162), (222, 90081), (333, 60054), (666, 30027), (999, 20018), (1998, 10009)]