20990222

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{15641}}^1$

素因数の和:15715

約数の個数: 16

約数和(自身を含む): 34912944

約数和(自身を除く): 13922722

約数列:

[1, 2, 11, 22, 61, 122, 671, 1342, 15641, 31282, 172051, 344102, 954101, 1908202, 10495111, 20990222]

約数ペア:

[(1, 20990222), (2, 10495111), (11, 1908202), (22, 954101), (61, 344102), (122, 172051), (671, 31282), (1342, 15641)]