20120991

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{4801}}^1$

素因数の和:4942

約数の個数: 16

約数和(自身を含む): 29503488

約数和(自身を除く): 9382497

約数列:

[1, 3, 11, 33, 127, 381, 1397, 4191, 4801, 14403, 52811, 158433, 609727, 1829181, 6706997, 20120991]

約数ペア:

[(1, 20120991), (3, 6706997), (11, 1829181), (33, 609727), (127, 158433), (381, 52811), (1397, 14403), (4191, 4801)]