21212523

素因数分解:

$3^4\times {\mathrm{257}}^1\times {\mathrm{1019}}^1$

素因数の和:1288

約数の個数: 20

約数和(自身を含む): 31842360

約数和(自身を除く): 10629837

約数列:

[1, 3, 9, 27, 81, 257, 771, 1019, 2313, 3057, 6939, 9171, 20817, 27513, 82539, 261883, 785649, 2356947, 7070841, 21212523]

約数ペア:

[(1, 21212523), (3, 7070841), (9, 2356947), (27, 785649), (81, 261883), (257, 82539), (771, 27513), (1019, 20817), (2313, 9171), (3057, 6939)]