20659640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16661}}^1$

素因数の和:16703

約数の個数: 32

約数和(自身を含む): 47986560

約数和(自身を除く): 27326920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16661, 33322, 66644, 83305, 133288, 166610, 333220, 516491, 666440, 1032982, 2065964, 2582455, 4131928, 5164910, 10329820, 20659640]

約数ペア:

[(1, 20659640), (2, 10329820), (4, 5164910), (5, 4131928), (8, 2582455), (10, 2065964), (20, 1032982), (31, 666440), (40, 516491), (62, 333220), (124, 166610), (155, 133288), (248, 83305), (310, 66644), (620, 33322), (1240, 16661)]