21105447

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{821}}^1$

素因数の和:895

約数の個数: 32

約数和(自身を含む): 33143040

約数和(自身を除く): 12037593

約数列:

[1, 3, 11, 19, 33, 41, 57, 123, 209, 451, 627, 779, 821, 1353, 2337, 2463, 8569, 9031, 15599, 25707, 27093, 33661, 46797, 100983, 171589, 370271, 514767, 639559, 1110813, 1918677, 7035149, 21105447]

約数ペア:

[(1, 21105447), (3, 7035149), (11, 1918677), (19, 1110813), (33, 639559), (41, 514767), (57, 370271), (123, 171589), (209, 100983), (451, 46797), (627, 33661), (779, 27093), (821, 25707), (1353, 15599), (2337, 9031), (2463, 8569)]