21789859

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{433}}^1$

素因数の和:539

約数の個数: 24

約数和(自身を含む): 27706560

約数和(自身を除く): 5916701

約数列:

[1, 7, 13, 49, 79, 91, 433, 553, 637, 1027, 3031, 3871, 5629, 7189, 21217, 34207, 39403, 50323, 239449, 275821, 444691, 1676143, 3112837, 21789859]

約数ペア:

[(1, 21789859), (7, 3112837), (13, 1676143), (49, 444691), (79, 275821), (91, 239449), (433, 50323), (553, 39403), (637, 34207), (1027, 21217), (3031, 7189), (3871, 5629)]