21092805

素因数分解:

$3^4\times 5^1\times {\mathrm{52081}}^1$

素因数の和:52098

約数の個数: 20

約数和(自身を含む): 37811532

約数和(自身を除く): 16718727

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52081, 156243, 260405, 468729, 781215, 1406187, 2343645, 4218561, 7030935, 21092805]

約数ペア:

[(1, 21092805), (3, 7030935), (5, 4218561), (9, 2343645), (15, 1406187), (27, 781215), (45, 468729), (81, 260405), (135, 156243), (405, 52081)]