28181978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{67421}}^1$

素因数の和:67453

約数の個数: 16

約数和(自身を含む): 48543840

約数和(自身を除く): 20361862

約数列:

[1, 2, 11, 19, 22, 38, 209, 418, 67421, 134842, 741631, 1280999, 1483262, 2561998, 14090989, 28181978]

約数ペア:

[(1, 28181978), (2, 14090989), (11, 2561998), (19, 1483262), (22, 1280999), (38, 741631), (209, 134842), (418, 67421)]