20965978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{571}}^1\times {\mathrm{1669}}^1$

素因数の和:2253

約数の個数: 16

約数和(自身を含む): 34388640

約数和(自身を除く): 13422662

約数列:

[1, 2, 11, 22, 571, 1142, 1669, 3338, 6281, 12562, 18359, 36718, 952999, 1905998, 10482989, 20965978]

約数ペア:

[(1, 20965978), (2, 10482989), (11, 1905998), (22, 952999), (571, 36718), (1142, 18359), (1669, 12562), (3338, 6281)]