18913905

素因数分解:

$3^6\times 5^1\times {\mathrm{5189}}^1$

素因数の和:5212

約数の個数: 28

約数和(自身を含む): 34036020

約数和(自身を除く): 15122115

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5189, 15567, 25945, 46701, 77835, 140103, 233505, 420309, 700515, 1260927, 2101545, 3782781, 6304635, 18913905]

約数ペア:

[(1, 18913905), (3, 6304635), (5, 3782781), (9, 2101545), (15, 1260927), (27, 700515), (45, 420309), (81, 233505), (135, 140103), (243, 77835), (405, 46701), (729, 25945), (1215, 15567), (3645, 5189)]