28787805

素因数分解:

$3^4\times 5^1\times {\mathrm{71081}}^1$

素因数の和:71098

約数の個数: 20

約数和(自身を含む): 51605532

約数和(自身を除く): 22817727

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 71081, 213243, 355405, 639729, 1066215, 1919187, 3198645, 5757561, 9595935, 28787805]

約数ペア:

[(1, 28787805), (3, 9595935), (5, 5757561), (9, 3198645), (15, 1919187), (27, 1066215), (45, 639729), (81, 355405), (135, 213243), (405, 71081)]