21688209

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{47251}}^1$

素因数の和:47277

約数の個数: 16

約数和(自身を含む): 34021440

約数和(自身を除く): 12333231

約数列:

[1, 3, 9, 17, 27, 51, 153, 459, 47251, 141753, 425259, 803267, 1275777, 2409801, 7229403, 21688209]

約数ペア:

[(1, 21688209), (3, 7229403), (9, 2409801), (17, 1275777), (27, 803267), (51, 425259), (153, 141753), (459, 47251)]