21554721

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42017}}^1$

素因数の和:42045

約数の個数: 16

約数和(自身を含む): 33614400

約数和(自身を除く): 12059679

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42017, 126051, 378153, 798323, 1134459, 2394969, 7184907, 21554721]

約数ペア:

[(1, 21554721), (3, 7184907), (9, 2394969), (19, 1134459), (27, 798323), (57, 378153), (171, 126051), (513, 42017)]