20906909121

素因数分解:

$3^1\times 7^1\times {\mathrm{4783}}^1\times {\mathrm{208147}}^1$

素因数の和:212940

約数の個数: 16

約数和(自身を含む): 31864961024

約数和(自身を除く): 10958051903

約数列:

[1, 3, 7, 21, 4783, 14349, 33481, 100443, 208147, 624441, 1457029, 4371087, 995567101, 2986701303, 6968969707, 20906909121]

約数ペア:

[(1, 20906909121), (3, 6968969707), (7, 2986701303), (21, 995567101), (4783, 4371087), (14349, 1457029), (33481, 624441), (100443, 208147)]