12807640

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1609}}^1$

素因数の和:1819

約数の個数: 32

約数和(自身を含む): 28980000

約数和(自身を除く): 16172360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1609, 1990, 3218, 3980, 6436, 7960, 8045, 12872, 16090, 32180, 64360, 320191, 640382, 1280764, 1600955, 2561528, 3201910, 6403820, 12807640]

約数ペア:

[(1, 12807640), (2, 6403820), (4, 3201910), (5, 2561528), (8, 1600955), (10, 1280764), (20, 640382), (40, 320191), (199, 64360), (398, 32180), (796, 16090), (995, 12872), (1592, 8045), (1609, 7960), (1990, 6436), (3218, 3980)]