128388519

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{28703}}^1$

素因数の和:28787

約数の個数: 24

約数和(自身を含む): 214935552

約数和(自身を除く): 86547033

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 28703, 86109, 200921, 258327, 602763, 1808289, 2037913, 6113739, 14265391, 18341217, 42796173, 128388519]

約数ペア:

[(1, 128388519), (3, 42796173), (7, 18341217), (9, 14265391), (21, 6113739), (63, 2037913), (71, 1808289), (213, 602763), (497, 258327), (639, 200921), (1491, 86109), (4473, 28703)]