18912891

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{6997}}^1$

素因数の和:7070

約数の個数: 16

約数和(自身を含む): 27208224

約数和(自身を除く): 8295333

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 6997, 20991, 118949, 356847, 370841, 1112523, 6304297, 18912891]

約数ペア:

[(1, 18912891), (3, 6304297), (17, 1112523), (51, 370841), (53, 356847), (159, 118949), (901, 20991), (2703, 6997)]