66720040

素因数分解:

$2^3\times 5^1\times {\mathrm{1668001}}^1$

素因数の和:1668012

約数の個数: 16

約数和(自身を含む): 150120180

約数和(自身を除く): 83400140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1668001, 3336002, 6672004, 8340005, 13344008, 16680010, 33360020, 66720040]

約数ペア:

[(1, 66720040), (2, 33360020), (4, 16680010), (5, 13344008), (8, 8340005), (10, 6672004), (20, 3336002), (40, 1668001)]