21275265

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128941}}^1$

素因数の和:128960

約数の個数: 16

約数和(自身を含む): 37135296

約数和(自身を除く): 15860031

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128941, 386823, 644705, 1418351, 1934115, 4255053, 7091755, 21275265]

約数ペア:

[(1, 21275265), (3, 7091755), (5, 4255053), (11, 1934115), (15, 1418351), (33, 644705), (55, 386823), (165, 128941)]