21981531

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{51239}}^1$

素因数の和:51266

約数の個数: 16

約数和(自身を含む): 34433280

約数和(自身を除く): 12451749

約数列:

[1, 3, 11, 13, 33, 39, 143, 429, 51239, 153717, 563629, 666107, 1690887, 1998321, 7327177, 21981531]

約数ペア:

[(1, 21981531), (3, 7327177), (11, 1998321), (13, 1690887), (33, 666107), (39, 563629), (143, 153717), (429, 51239)]