999539980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{1087}}^1\times {\mathrm{1999}}^1$

素因数の和:3118

約数の個数: 48

約数和(自身を含む): 2193408000

約数和(自身を除く): 1193868020

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 1087, 1999, 2174, 3998, 4348, 5435, 7996, 9995, 10870, 19990, 21740, 25001, 39980, 45977, 50002, 91954, 100004, 125005, 183908, 229885, 250010, 459770, 500020, 919540, 2172913, 4345826, 8691652, 10864565, 21729130, 43458260, 49976999, 99953998, 199907996, 249884995, 499769990, 999539980]

約数ペア:

[(1, 999539980), (2, 499769990), (4, 249884995), (5, 199907996), (10, 99953998), (20, 49976999), (23, 43458260), (46, 21729130), (92, 10864565), (115, 8691652), (230, 4345826), (460, 2172913), (1087, 919540), (1999, 500020), (2174, 459770), (3998, 250010), (4348, 229885), (5435, 183908), (7996, 125005), (9995, 100004), (10870, 91954), (19990, 50002), (21740, 45977), (25001, 39980)]