20512521

素因数分解:

$3^4\times {\mathrm{157}}^1\times {\mathrm{1613}}^1$

素因数の和:1782

約数の個数: 20

約数和(自身を含む): 30856452

約数和(自身を除く): 10343931

約数列:

[1, 3, 9, 27, 81, 157, 471, 1413, 1613, 4239, 4839, 12717, 14517, 43551, 130653, 253241, 759723, 2279169, 6837507, 20512521]

約数ペア:

[(1, 20512521), (3, 6837507), (9, 2279169), (27, 759723), (81, 253241), (157, 130653), (471, 43551), (1413, 14517), (1613, 12717), (4239, 4839)]