19680155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{1999}}^1$

素因数の和:2194

約数の個数: 16

約数和(自身を含む): 25920000

約数和(自身を除く): 6239845

約数列:

[1, 5, 11, 55, 179, 895, 1969, 1999, 9845, 9995, 21989, 109945, 357821, 1789105, 3936031, 19680155]

約数ペア:

[(1, 19680155), (5, 3936031), (11, 1789105), (55, 357821), (179, 109945), (895, 21989), (1969, 9995), (1999, 9845)]