21089805

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127817}}^1$

素因数の和:127836

約数の個数: 16

約数和(自身を含む): 36811584

約数和(自身を除く): 15721779

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 127817, 383451, 639085, 1405987, 1917255, 4217961, 7029935, 21089805]

約数ペア:

[(1, 21089805), (3, 7029935), (5, 4217961), (11, 1917255), (15, 1405987), (33, 639085), (55, 383451), (165, 127817)]