19491380

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8941}}^1$

素因数の和:9059

約数の個数: 24

約数和(自身を含む): 41312040

約数和(自身を除く): 21820660

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8941, 17882, 35764, 44705, 89410, 178820, 974569, 1949138, 3898276, 4872845, 9745690, 19491380]

約数ペア:

[(1, 19491380), (2, 9745690), (4, 4872845), (5, 3898276), (10, 1949138), (20, 974569), (109, 178820), (218, 89410), (436, 44705), (545, 35764), (1090, 17882), (2180, 8941)]