18781389

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{197}}^1$

素因数の和:327

約数の個数: 40

約数和(自身を含む): 31049568

約数和(自身を除く): 12268179

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 107, 197, 297, 321, 591, 891, 963, 1177, 1773, 2167, 2889, 3531, 5319, 6501, 8667, 10593, 15957, 19503, 21079, 31779, 58509, 63237, 95337, 175527, 189711, 231869, 569133, 695607, 1707399, 2086821, 6260463, 18781389]

約数ペア:

[(1, 18781389), (3, 6260463), (9, 2086821), (11, 1707399), (27, 695607), (33, 569133), (81, 231869), (99, 189711), (107, 175527), (197, 95337), (297, 63237), (321, 58509), (591, 31779), (891, 21079), (963, 19503), (1177, 15957), (1773, 10593), (2167, 8667), (2889, 6501), (3531, 5319)]