21387179

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{3301}}^1$

素因数の和:3362

約数の個数: 16

約数和(自身を含む): 25359360

約数和(自身を除く): 3972181

約数列:

[1, 11, 19, 31, 209, 341, 589, 3301, 6479, 36311, 62719, 102331, 689909, 1125641, 1944289, 21387179]

約数ペア:

[(1, 21387179), (11, 1944289), (19, 1125641), (31, 689909), (209, 102331), (341, 62719), (589, 36311), (3301, 6479)]