21081009

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1\times {\mathrm{1061}}^1$

素因数の和:1280

約数の個数: 16

約数和(自身を含む): 29056320

約数和(自身を除く): 7975311

約数列:

[1, 3, 37, 111, 179, 537, 1061, 3183, 6623, 19869, 39257, 117771, 189919, 569757, 7027003, 21081009]

約数ペア:

[(1, 21081009), (3, 7027003), (37, 569757), (111, 189919), (179, 117771), (537, 39257), (1061, 19869), (3183, 6623)]