18840789

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:183

約数の個数: 48

約数和(自身を含む): 31494400

約数和(自身を除く): 12653611

約数列:

[1, 3, 9, 11, 27, 33, 73, 79, 99, 121, 219, 237, 297, 363, 657, 711, 803, 869, 1089, 1971, 2133, 2409, 2607, 3267, 5767, 7227, 7821, 8833, 9559, 17301, 21681, 23463, 26499, 28677, 51903, 63437, 79497, 86031, 155709, 190311, 238491, 258093, 570933, 697807, 1712799, 2093421, 6280263, 18840789]

約数ペア:

[(1, 18840789), (3, 6280263), (9, 2093421), (11, 1712799), (27, 697807), (33, 570933), (73, 258093), (79, 238491), (99, 190311), (121, 155709), (219, 86031), (237, 79497), (297, 63437), (363, 51903), (657, 28677), (711, 26499), (803, 23463), (869, 21681), (1089, 17301), (1971, 9559), (2133, 8833), (2409, 7821), (2607, 7227), (3267, 5767)]