19957779

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{43481}}^1$

素因数の和:43507

約数の個数: 16

約数和(自身を含む): 31307040

約数和(自身を除く): 11349261

約数列:

[1, 3, 9, 17, 27, 51, 153, 459, 43481, 130443, 391329, 739177, 1173987, 2217531, 6652593, 19957779]

約数ペア:

[(1, 19957779), (3, 6652593), (9, 2217531), (17, 1173987), (27, 739177), (51, 391329), (153, 130443), (459, 43481)]