21256712

素因数分解:

$2^3\times {\mathrm{263}}^1\times {\mathrm{10103}}^1$

素因数の和:10372

約数の個数: 16

約数和(自身を含む): 40011840

約数和(自身を除く): 18755128

約数列:

[1, 2, 4, 8, 263, 526, 1052, 2104, 10103, 20206, 40412, 80824, 2657089, 5314178, 10628356, 21256712]

約数ペア:

[(1, 21256712), (2, 10628356), (4, 5314178), (8, 2657089), (263, 80824), (526, 40412), (1052, 20206), (2104, 10103)]