20638882

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{21817}}^1$

素因数の和:21873

約数の個数: 16

約数和(自身を含む): 34559712

約数和(自身を除く): 13920830

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 21817, 43634, 239987, 479974, 938131, 1876262, 10319441, 20638882]

約数ペア:

[(1, 20638882), (2, 10319441), (11, 1876262), (22, 938131), (43, 479974), (86, 239987), (473, 43634), (946, 21817)]