21290810

素因数分解:

$2^1\times 5^1\times {\mathrm{661}}^1\times {\mathrm{3221}}^1$

素因数の和:3889

約数の個数: 16

約数和(自身を含む): 38393352

約数和(自身を除く): 17102542

約数列:

[1, 2, 5, 10, 661, 1322, 3221, 3305, 6442, 6610, 16105, 32210, 2129081, 4258162, 10645405, 21290810]

約数ペア:

[(1, 21290810), (2, 10645405), (5, 4258162), (10, 2129081), (661, 32210), (1322, 16105), (3221, 6610), (3305, 6442)]