521721

素因数分解:

$3^5\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:147

約数の個数: 24

約数和(自身を含む): 829920

約数和(自身を除く): 308199

約数列:

[1, 3, 9, 19, 27, 57, 81, 113, 171, 243, 339, 513, 1017, 1539, 2147, 3051, 4617, 6441, 9153, 19323, 27459, 57969, 173907, 521721]

約数ペア:

[(1, 521721), (3, 173907), (9, 57969), (19, 27459), (27, 19323), (57, 9153), (81, 6441), (113, 4617), (171, 3051), (243, 2147), (339, 1539), (513, 1017)]