21771255

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131947}}^1$

素因数の和:131966

約数の個数: 16

約数和(自身を含む): 38001024

約数和(自身を除く): 16229769

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 131947, 395841, 659735, 1451417, 1979205, 4354251, 7257085, 21771255]

約数ペア:

[(1, 21771255), (3, 7257085), (5, 4354251), (11, 1979205), (15, 1451417), (33, 659735), (55, 395841), (165, 131947)]