20557971

素因数分解:

$3^2\times 7^1\times {\mathrm{179}}^1\times {\mathrm{1823}}^1$

素因数の和:2015

約数の個数: 24

約数和(自身を含む): 34145280

約数和(自身を除く): 13587309

約数列:

[1, 3, 7, 9, 21, 63, 179, 537, 1253, 1611, 1823, 3759, 5469, 11277, 12761, 16407, 38283, 114849, 326317, 978951, 2284219, 2936853, 6852657, 20557971]

約数ペア:

[(1, 20557971), (3, 6852657), (7, 2936853), (9, 2284219), (21, 978951), (63, 326317), (179, 114849), (537, 38283), (1253, 16407), (1611, 12761), (1823, 11277), (3759, 5469)]