21288447

素因数分解:

$3^3\times {\mathrm{239}}^1\times {\mathrm{3299}}^1$

素因数の和:3547

約数の個数: 16

約数和(自身を含む): 31680000

約数和(自身を除く): 10391553

約数列:

[1, 3, 9, 27, 239, 717, 2151, 3299, 6453, 9897, 29691, 89073, 788461, 2365383, 7096149, 21288447]

約数ペア:

[(1, 21288447), (3, 7096149), (9, 2365383), (27, 788461), (239, 89073), (717, 29691), (2151, 9897), (3299, 6453)]