128515221

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{479}}^1\times {\mathrm{523}}^1$

素因数の和:1030

約数の個数: 32

約数和(自身を含む): 201216000

約数和(自身を除く): 72700779

約数列:

[1, 3, 9, 19, 27, 57, 171, 479, 513, 523, 1437, 1569, 4311, 4707, 9101, 9937, 12933, 14121, 27303, 29811, 81909, 89433, 245727, 250517, 268299, 751551, 2254653, 4759823, 6763959, 14279469, 42838407, 128515221]

約数ペア:

[(1, 128515221), (3, 42838407), (9, 14279469), (19, 6763959), (27, 4759823), (57, 2254653), (171, 751551), (479, 268299), (513, 250517), (523, 245727), (1437, 89433), (1569, 81909), (4311, 29811), (4707, 27303), (9101, 14121), (9937, 12933)]