21000427981

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{769}}^1\times {\mathrm{4261}}^1$

素因数の和:5089

約数の個数: 32

約数和(自身を含む): 24809954400

約数和(自身を除く): 3809526419

約数列:

[1, 13, 17, 29, 221, 377, 493, 769, 4261, 6409, 9997, 13073, 22301, 55393, 72437, 123569, 169949, 289913, 379117, 941681, 1606397, 2100673, 3276709, 4928521, 27308749, 42597217, 55704053, 95024561, 724152689, 1235319293, 1615417537, 21000427981]

約数ペア:

[(1, 21000427981), (13, 1615417537), (17, 1235319293), (29, 724152689), (221, 95024561), (377, 55704053), (493, 42597217), (769, 27308749), (4261, 4928521), (6409, 3276709), (9997, 2100673), (13073, 1606397), (22301, 941681), (55393, 379117), (72437, 289913), (123569, 169949)]