19909989

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1559}}^1$

素因数の和:1622

約数の個数: 32

約数和(自身を含む): 32947200

約数和(自身を除く): 13037211

約数列:

[1, 3, 9, 11, 27, 33, 43, 99, 129, 297, 387, 473, 1161, 1419, 1559, 4257, 4677, 12771, 14031, 17149, 42093, 51447, 67037, 154341, 201111, 463023, 603333, 737407, 1809999, 2212221, 6636663, 19909989]

約数ペア:

[(1, 19909989), (3, 6636663), (9, 2212221), (11, 1809999), (27, 737407), (33, 603333), (43, 463023), (99, 201111), (129, 154341), (297, 67037), (387, 51447), (473, 42093), (1161, 17149), (1419, 14031), (1559, 12771), (4257, 4677)]