19878310

素因数分解:

$2^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{9421}}^1$

素因数の和:9639

約数の個数: 16

約数和(自身を含む): 35954352

約数和(自身を除く): 16076042

約数列:

[1, 2, 5, 10, 211, 422, 1055, 2110, 9421, 18842, 47105, 94210, 1987831, 3975662, 9939155, 19878310]

約数ペア:

[(1, 19878310), (2, 9939155), (5, 3975662), (10, 1987831), (211, 94210), (422, 47105), (1055, 18842), (2110, 9421)]