21257636

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{67271}}^1$

素因数の和:67354

約数の個数: 12

約数和(自身を含む): 37672320

約数和(自身を除く): 16414684

約数列:

[1, 2, 4, 79, 158, 316, 67271, 134542, 269084, 5314409, 10628818, 21257636]

約数ペア:

[(1, 21257636), (2, 10628818), (4, 5314409), (79, 269084), (158, 134542), (316, 67271)]