21449968180

素因数分解:

$2^2\times 5^1\times {\mathrm{1489}}^1\times {\mathrm{720281}}^1$

素因数の和:721779

約数の個数: 24

約数和(自身を含む): 45075247560

約数和(自身を除く): 23625279380

約数列:

[1, 2, 4, 5, 10, 20, 1489, 2978, 5956, 7445, 14890, 29780, 720281, 1440562, 2881124, 3601405, 7202810, 14405620, 1072498409, 2144996818, 4289993636, 5362492045, 10724984090, 21449968180]

約数ペア:

[(1, 21449968180), (2, 10724984090), (4, 5362492045), (5, 4289993636), (10, 2144996818), (20, 1072498409), (1489, 14405620), (2978, 7202810), (5956, 3601405), (7445, 2881124), (14890, 1440562), (29780, 720281)]