15840040

素因数分解:

$2^3\times 5^1\times {\mathrm{396001}}^1$

素因数の和:396012

約数の個数: 16

約数和(自身を含む): 35640180

約数和(自身を除く): 19800140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 396001, 792002, 1584004, 1980005, 3168008, 3960010, 7920020, 15840040]

約数ペア:

[(1, 15840040), (2, 7920020), (4, 3960010), (5, 3168008), (8, 1980005), (10, 1584004), (20, 792002), (40, 396001)]