7886417620

素因数分解:

$2^2\times 5^1\times {\mathrm{394320881}}^1$

素因数の和:394320890

約数の個数: 12

約数和(自身を含む): 16561477044

約数和(自身を除く): 8675059424

約数列:

[1, 2, 4, 5, 10, 20, 394320881, 788641762, 1577283524, 1971604405, 3943208810, 7886417620]

約数ペア:

[(1, 7886417620), (2, 3943208810), (4, 1971604405), (5, 1577283524), (10, 788641762), (20, 394320881)]