18991323

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 31370976

約数和(自身を除く): 12379653

約数列:

[1, 3, 9, 13, 37, 39, 41, 107, 111, 117, 123, 321, 333, 369, 481, 533, 963, 1391, 1443, 1517, 1599, 3959, 4173, 4329, 4387, 4551, 4797, 11877, 12519, 13161, 13653, 19721, 35631, 39483, 51467, 57031, 59163, 154401, 162319, 171093, 177489, 463203, 486957, 513279, 1460871, 2110147, 6330441, 18991323]

約数ペア:

[(1, 18991323), (3, 6330441), (9, 2110147), (13, 1460871), (37, 513279), (39, 486957), (41, 463203), (107, 177489), (111, 171093), (117, 162319), (123, 154401), (321, 59163), (333, 57031), (369, 51467), (481, 39483), (533, 35631), (963, 19721), (1391, 13653), (1443, 13161), (1517, 12519), (1599, 11877), (3959, 4797), (4173, 4551), (4329, 4387)]