19890.000000

素因数分解:

$2^4\times 7^1\times {\mathrm{2789}}^1$

素因数の和:2804

約数の個数: 20

約数和(自身を含む): 691920

約数和(自身を除く): 379552

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 2789, 5578, 11156, 19523, 22312, 39046, 44624, 78092, 156184, 312368]

約数ペア:

[(1, 312368), (2, 156184), (4, 78092), (7, 44624), (8, 39046), (14, 22312), (16, 19523), (28, 11156), (56, 5578), (112, 2789)]