21257216

素因数分解:

$2^{10}\times {\mathrm{20759}}^1$

素因数の和:20779

約数の個数: 22

約数和(自身を含む): 42495720

約数和(自身を除く): 21238504

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 20759, 41518, 83036, 166072, 332144, 664288, 1328576, 2657152, 5314304, 10628608, 21257216]

約数ペア:

[(1, 21257216), (2, 10628608), (4, 5314304), (8, 2657152), (16, 1328576), (32, 664288), (64, 332144), (128, 166072), (256, 83036), (512, 41518), (1024, 20759)]