879640040

素因数分解:

$2^3\times 5^1\times {\mathrm{21991001}}^1$

素因数の和:21991012

約数の個数: 16

約数和(自身を含む): 1979190180

約数和(自身を除く): 1099550140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 21991001, 43982002, 87964004, 109955005, 175928008, 219910010, 439820020, 879640040]

約数ペア:

[(1, 879640040), (2, 439820020), (4, 219910010), (5, 175928008), (8, 109955005), (10, 87964004), (20, 43982002), (40, 21991001)]