28786317

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{557}}^1$

素因数の和:697

約数の個数: 32

約数和(自身を含む): 46282752

約数和(自身を除く): 17496435

約数列:

[1, 3, 7, 21, 23, 69, 107, 161, 321, 483, 557, 749, 1671, 2247, 2461, 3899, 7383, 11697, 12811, 17227, 38433, 51681, 59599, 89677, 178797, 269031, 417193, 1251579, 1370777, 4112331, 9595439, 28786317]

約数ペア:

[(1, 28786317), (3, 9595439), (7, 4112331), (21, 1370777), (23, 1251579), (69, 417193), (107, 269031), (161, 178797), (321, 89677), (483, 59599), (557, 51681), (749, 38433), (1671, 17227), (2247, 12811), (2461, 11697), (3899, 7383)]