19993617

素因数分解:

$3^2\times 7^2\times {\mathrm{45337}}^1$

素因数の和:45357

約数の個数: 18

約数和(自身を含む): 33595458

約数和(自身を除く): 13601841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45337, 136011, 317359, 408033, 952077, 2221513, 2856231, 6664539, 19993617]

約数ペア:

[(1, 19993617), (3, 6664539), (7, 2856231), (9, 2221513), (21, 952077), (49, 408033), (63, 317359), (147, 136011), (441, 45337)]