19811906

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{2153}}^1$

素因数の和:2305

約数の個数: 16

約数和(自身を含む): 30707424

約数和(自身を除く): 10895518

約数列:

[1, 2, 43, 86, 107, 214, 2153, 4306, 4601, 9202, 92579, 185158, 230371, 460742, 9905953, 19811906]

約数ペア:

[(1, 19811906), (2, 9905953), (43, 460742), (86, 230371), (107, 185158), (214, 92579), (2153, 9202), (4306, 4601)]