20645889

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^2\times {\mathrm{457}}^1$

素因数の和:545

約数の個数: 24

約数和(自身を含む): 30931488

約数和(自身を除く): 10285599

約数列:

[1, 3, 11, 33, 37, 111, 407, 457, 1221, 1369, 1371, 4107, 5027, 15059, 15081, 16909, 45177, 50727, 185999, 557997, 625633, 1876899, 6881963, 20645889]

約数ペア:

[(1, 20645889), (3, 6881963), (11, 1876899), (33, 625633), (37, 557997), (111, 185999), (407, 50727), (457, 45177), (1221, 16909), (1369, 15081), (1371, 15059), (4107, 5027)]