8031640

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1009}}^1$

素因数の和:1219

約数の個数: 32

約数和(自身を含む): 18180000

約数和(自身を除く): 10148360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1009, 1592, 1990, 2018, 3980, 4036, 5045, 7960, 8072, 10090, 20180, 40360, 200791, 401582, 803164, 1003955, 1606328, 2007910, 4015820, 8031640]

約数ペア:

[(1, 8031640), (2, 4015820), (4, 2007910), (5, 1606328), (8, 1003955), (10, 803164), (20, 401582), (40, 200791), (199, 40360), (398, 20180), (796, 10090), (995, 8072), (1009, 7960), (1592, 5045), (1990, 4036), (2018, 3980)]