21477879

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{5003}}^1$

素因数の和:5068

約数の個数: 20

約数和(自身を含む): 32696136

約数和(自身を除く): 11218257

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 5003, 15009, 45027, 135081, 265159, 405243, 795477, 2386431, 7159293, 21477879]

約数ペア:

[(1, 21477879), (3, 7159293), (9, 2386431), (27, 795477), (53, 405243), (81, 265159), (159, 135081), (477, 45027), (1431, 15009), (4293, 5003)]