20392420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1061}}^1$

素因数の和:1132

約数の個数: 36

約数和(自身を含む): 44291772

約数和(自身を除く): 23899352

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1061, 1922, 2122, 3844, 4244, 4805, 5305, 9610, 10610, 19220, 21220, 32891, 65782, 131564, 164455, 328910, 657820, 1019621, 2039242, 4078484, 5098105, 10196210, 20392420]

約数ペア:

[(1, 20392420), (2, 10196210), (4, 5098105), (5, 4078484), (10, 2039242), (20, 1019621), (31, 657820), (62, 328910), (124, 164455), (155, 131564), (310, 65782), (620, 32891), (961, 21220), (1061, 19220), (1922, 10610), (2122, 9610), (3844, 5305), (4244, 4805)]