15912040

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1999}}^1$

素因数の和:2209

約数の個数: 32

約数和(自身を含む): 36000000

約数和(自身を除く): 20087960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 1999, 3980, 3998, 7960, 7996, 9995, 15992, 19990, 39980, 79960, 397801, 795602, 1591204, 1989005, 3182408, 3978010, 7956020, 15912040]

約数ペア:

[(1, 15912040), (2, 7956020), (4, 3978010), (5, 3182408), (8, 1989005), (10, 1591204), (20, 795602), (40, 397801), (199, 79960), (398, 39980), (796, 19990), (995, 15992), (1592, 9995), (1990, 7996), (1999, 7960), (3980, 3998)]