19987263

素因数分解:

$3^3\times {\mathrm{569}}^1\times {\mathrm{1301}}^1$

素因数の和:1879

約数の個数: 16

約数和(自身を含む): 29685600

約数和(自身を除く): 9698337

約数列:

[1, 3, 9, 27, 569, 1301, 1707, 3903, 5121, 11709, 15363, 35127, 740269, 2220807, 6662421, 19987263]

約数ペア:

[(1, 19987263), (3, 6662421), (9, 2220807), (27, 740269), (569, 35127), (1301, 15363), (1707, 11709), (3903, 5121)]