21789945

素因数分解:

$3^3\times 5^1\times {\mathrm{161407}}^1$

素因数の和:161421

約数の個数: 16

約数和(自身を含む): 38737920

約数和(自身を除く): 16947975

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 161407, 484221, 807035, 1452663, 2421105, 4357989, 7263315, 21789945]

約数ペア:

[(1, 21789945), (3, 7263315), (5, 4357989), (9, 2421105), (15, 1452663), (27, 807035), (45, 484221), (135, 161407)]