20218315

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{337}}^1$

素因数の和:439

約数の個数: 24

約数和(自身を含む): 26720928

約数和(自身を除く): 6502613

約数列:

[1, 5, 13, 65, 71, 169, 337, 355, 845, 923, 1685, 4381, 4615, 11999, 21905, 23927, 56953, 59995, 119635, 284765, 311051, 1555255, 4043663, 20218315]

約数ペア:

[(1, 20218315), (5, 4043663), (13, 1555255), (65, 311051), (71, 284765), (169, 119635), (337, 59995), (355, 56953), (845, 23927), (923, 21905), (1685, 11999), (4381, 4615)]