18993981

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{7027}}^1$

素因数の和:7100

約数の個数: 16

約数和(自身を含む): 27324864

約数和(自身を除く): 8330883

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 7027, 21081, 119459, 358377, 372431, 1117293, 6331327, 18993981]

約数ペア:

[(1, 18993981), (3, 6331327), (17, 1117293), (51, 372431), (53, 358377), (159, 119459), (901, 21081), (2703, 7027)]