21878156

素因数分解:

$2^2\times {\mathrm{97}}^1\times {\mathrm{113}}^1\times {\mathrm{499}}^1$

素因数の和:713

約数の個数: 24

約数和(自身を含む): 39102000

約数和(自身を除く): 17223844

約数列:

[1, 2, 4, 97, 113, 194, 226, 388, 452, 499, 998, 1996, 10961, 21922, 43844, 48403, 56387, 96806, 112774, 193612, 225548, 5469539, 10939078, 21878156]

約数ペア:

[(1, 21878156), (2, 10939078), (4, 5469539), (97, 225548), (113, 193612), (194, 112774), (226, 96806), (388, 56387), (452, 48403), (499, 43844), (998, 21922), (1996, 10961)]