21215493

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{60443}}^1$

素因数の和:60465

約数の個数: 16

約数和(自身を含む): 33848640

約数和(自身を除く): 12633147

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 60443, 181329, 543987, 785759, 1631961, 2357277, 7071831, 21215493]

約数ペア:

[(1, 21215493), (3, 7071831), (9, 2357277), (13, 1631961), (27, 785759), (39, 543987), (117, 181329), (351, 60443)]