21638943

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{607}}^1$

素因数の和:863

約数の個数: 24

約数和(自身を含む): 33291648

約数和(自身を除く): 11652705

約数列:

[1, 3, 9, 17, 51, 153, 233, 607, 699, 1821, 2097, 3961, 5463, 10319, 11883, 30957, 35649, 92871, 141431, 424293, 1272879, 2404327, 7212981, 21638943]

約数ペア:

[(1, 21638943), (3, 7212981), (9, 2404327), (17, 1272879), (51, 424293), (153, 141431), (233, 92871), (607, 35649), (699, 30957), (1821, 11883), (2097, 10319), (3961, 5463)]