21001216

素因数分解:

$2^{10}\times {\mathrm{20509}}^1$

素因数の和:20529

約数の個数: 22

約数和(自身を含む): 41983970

約数和(自身を除く): 20982754

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 20509, 41018, 82036, 164072, 328144, 656288, 1312576, 2625152, 5250304, 10500608, 21001216]

約数ペア:

[(1, 21001216), (2, 10500608), (4, 5250304), (8, 2625152), (16, 1312576), (32, 656288), (64, 328144), (128, 164072), (256, 82036), (512, 41018), (1024, 20509)]