8715640

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1999}}^1$

素因数の和:2119

約数の個数: 32

約数和(自身を含む): 19800000

約数和(自身を除く): 11084360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 1999, 2180, 3998, 4360, 7996, 9995, 15992, 19990, 39980, 79960, 217891, 435782, 871564, 1089455, 1743128, 2178910, 4357820, 8715640]

約数ペア:

[(1, 8715640), (2, 4357820), (4, 2178910), (5, 1743128), (8, 1089455), (10, 871564), (20, 435782), (40, 217891), (109, 79960), (218, 39980), (436, 19990), (545, 15992), (872, 9995), (1090, 7996), (1999, 4360), (2180, 3998)]