21211490

素因数分解:

$2^1\times 5^1\times {\mathrm{661}}^1\times {\mathrm{3209}}^1$

素因数の和:3877

約数の個数: 16

約数和(自身を含む): 38250360

約数和(自身を除く): 17038870

約数列:

[1, 2, 5, 10, 661, 1322, 3209, 3305, 6418, 6610, 16045, 32090, 2121149, 4242298, 10605745, 21211490]

約数ペア:

[(1, 21211490), (2, 10605745), (5, 4242298), (10, 2121149), (661, 32090), (1322, 16045), (3209, 6610), (3305, 6418)]