19912574

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{2213}}^1$

素因数の和:2635

約数の個数: 16

約数和(自身を含む): 32678640

約数和(自身を除く): 12766066

約数列:

[1, 2, 11, 22, 409, 818, 2213, 4426, 4499, 8998, 24343, 48686, 905117, 1810234, 9956287, 19912574]

約数ペア:

[(1, 19912574), (2, 9956287), (11, 1810234), (22, 905117), (409, 48686), (818, 24343), (2213, 8998), (4426, 4499)]