21166821

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{1601}}^1$

素因数の和:1733

約数の個数: 24

約数和(自身を含む): 33238296

約数和(自身を除く): 12071475

約数列:

[1, 3, 9, 13, 39, 113, 117, 339, 1017, 1469, 1601, 4407, 4803, 13221, 14409, 20813, 62439, 180913, 187317, 542739, 1628217, 2351869, 7055607, 21166821]

約数ペア:

[(1, 21166821), (3, 7055607), (9, 2351869), (13, 1628217), (39, 542739), (113, 187317), (117, 180913), (339, 62439), (1017, 20813), (1469, 14409), (1601, 13221), (4407, 4803)]