18720728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{180007}}^1$

素因数の和:180026

約数の個数: 16

約数和(自身を含む): 37801680

約数和(自身を除く): 19080952

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 180007, 360014, 720028, 1440056, 2340091, 4680182, 9360364, 18720728]

約数ペア:

[(1, 18720728), (2, 9360364), (4, 4680182), (8, 2340091), (13, 1440056), (26, 720028), (52, 360014), (104, 180007)]