19980729

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{431}}^1$

素因数の和:558

約数の個数: 32

約数和(自身を含む): 31726080

約数和(自身を除く): 11745351

約数列:

[1, 3, 9, 17, 27, 51, 101, 153, 303, 431, 459, 909, 1293, 1717, 2727, 3879, 5151, 7327, 11637, 15453, 21981, 43531, 46359, 65943, 130593, 197829, 391779, 740027, 1175337, 2220081, 6660243, 19980729]

約数ペア:

[(1, 19980729), (3, 6660243), (9, 2220081), (17, 1175337), (27, 740027), (51, 391779), (101, 197829), (153, 130593), (303, 65943), (431, 46359), (459, 43531), (909, 21981), (1293, 15453), (1717, 11637), (2727, 7327), (3879, 5151)]