21780309

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1\times {\mathrm{821}}^1$

素因数の和:1100

約数の個数: 16

約数和(自身を含む): 29986560

約数和(自身を除く): 8206251

約数列:

[1, 3, 37, 111, 239, 717, 821, 2463, 8843, 26529, 30377, 91131, 196219, 588657, 7260103, 21780309]

約数ペア:

[(1, 21780309), (3, 7260103), (37, 588657), (111, 196219), (239, 91131), (717, 30377), (821, 26529), (2463, 8843)]