21289311

素因数分解:

$3^4\times {\mathrm{433}}^1\times {\mathrm{607}}^1$

素因数の和:1052

約数の個数: 20

約数和(自身を含む): 31928512

約数和(自身を除く): 10639201

約数列:

[1, 3, 9, 27, 81, 433, 607, 1299, 1821, 3897, 5463, 11691, 16389, 35073, 49167, 262831, 788493, 2365479, 7096437, 21289311]

約数ペア:

[(1, 21289311), (3, 7096437), (9, 2365479), (27, 788493), (81, 262831), (433, 49167), (607, 35073), (1299, 16389), (1821, 11691), (3897, 5463)]