21387278

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{5431}}^1$

素因数の和:5623

約数の個数: 16

約数和(自身を含む): 35199360

約数和(自身を除く): 13812082

約数列:

[1, 2, 11, 22, 179, 358, 1969, 3938, 5431, 10862, 59741, 119482, 972149, 1944298, 10693639, 21387278]

約数ペア:

[(1, 21387278), (2, 10693639), (11, 1944298), (22, 972149), (179, 119482), (358, 59741), (1969, 10862), (3938, 5431)]