21905613

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42701}}^1$

素因数の和:42729

約数の個数: 16

約数和(自身を含む): 34161600

約数和(自身を除く): 12255987

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42701, 128103, 384309, 811319, 1152927, 2433957, 7301871, 21905613]

約数ペア:

[(1, 21905613), (3, 7301871), (9, 2433957), (19, 1152927), (27, 811319), (57, 384309), (171, 128103), (513, 42701)]