420518180

素因数分解:

$2^2\times 5^1\times {\mathrm{21025909}}^1$

素因数の和:21025918

約数の個数: 12

約数和(自身を含む): 883088220

約数和(自身を除く): 462570040

約数列:

[1, 2, 4, 5, 10, 20, 21025909, 42051818, 84103636, 105129545, 210259090, 420518180]

約数ペア:

[(1, 420518180), (2, 210259090), (4, 105129545), (5, 84103636), (10, 42051818), (20, 21025909)]