999976990

素因数分解:

$2^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{502501}}^1$

素因数の和:502707

約数の個数: 16

約数和(自身を含む): 1809007200

約数和(自身を除く): 809030210

約数列:

[1, 2, 5, 10, 199, 398, 995, 1990, 502501, 1005002, 2512505, 5025010, 99997699, 199995398, 499988495, 999976990]

約数ペア:

[(1, 999976990), (2, 499988495), (5, 199995398), (10, 99997699), (199, 5025010), (398, 2512505), (995, 1005002), (1990, 502501)]