18811521

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{3271}}^1$

素因数の和:3354

約数の個数: 20

約数和(自身を含む): 28505664

約数和(自身を除く): 9694143

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 3271, 5751, 9813, 29439, 88317, 232241, 264951, 696723, 2090169, 6270507, 18811521]

約数ペア:

[(1, 18811521), (3, 6270507), (9, 2090169), (27, 696723), (71, 264951), (81, 232241), (213, 88317), (639, 29439), (1917, 9813), (3271, 5751)]