20986587

素因数分解:

$3^3\times {\mathrm{79}}^1\times {\mathrm{9839}}^1$

素因数の和:9927

約数の個数: 16

約数和(自身を含む): 31488000

約数和(自身を除く): 10501413

約数列:

[1, 3, 9, 27, 79, 237, 711, 2133, 9839, 29517, 88551, 265653, 777281, 2331843, 6995529, 20986587]

約数ペア:

[(1, 20986587), (3, 6995529), (9, 2331843), (27, 777281), (79, 265653), (237, 88551), (711, 29517), (2133, 9839)]