21806805

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{33809}}^1$

素因数の和:33860

約数の個数: 16

約数和(自身を含む): 35703360

約数和(自身を除く): 13896555

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 33809, 101427, 169045, 507135, 1453787, 4361361, 7268935, 21806805]

約数ペア:

[(1, 21806805), (3, 7268935), (5, 4361361), (15, 1453787), (43, 507135), (129, 169045), (215, 101427), (645, 33809)]