1999000

素因数分解:

$2^3\times 5^3\times {\mathrm{1999}}^1$

素因数の和:2020

約数の個数: 32

約数和(自身を含む): 4680000

約数和(自身を除く): 2681000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 1999, 3998, 7996, 9995, 15992, 19990, 39980, 49975, 79960, 99950, 199900, 249875, 399800, 499750, 999500, 1999000]

約数ペア:

[(1, 1999000), (2, 999500), (4, 499750), (5, 399800), (8, 249875), (10, 199900), (20, 99950), (25, 79960), (40, 49975), (50, 39980), (100, 19990), (125, 15992), (200, 9995), (250, 7996), (500, 3998), (1000, 1999)]