210854889

素因数分解:

$3^2\times 7^2\times {\mathrm{478129}}^1$

素因数の和:478149

約数の個数: 18

約数和(自身を含む): 354294330

約数和(自身を除く): 143439441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 478129, 1434387, 3346903, 4303161, 10040709, 23428321, 30122127, 70284963, 210854889]

約数ペア:

[(1, 210854889), (3, 70284963), (7, 30122127), (9, 23428321), (21, 10040709), (49, 4303161), (63, 3346903), (147, 1434387), (441, 478129)]