21377288

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{39883}}^1$

素因数の和:39956

約数の個数: 16

約数和(自身を含む): 40681680

約数和(自身を除く): 19304392

約数列:

[1, 2, 4, 8, 67, 134, 268, 536, 39883, 79766, 159532, 319064, 2672161, 5344322, 10688644, 21377288]

約数ペア:

[(1, 21377288), (2, 10688644), (4, 5344322), (8, 2672161), (67, 319064), (134, 159532), (268, 79766), (536, 39883)]