21506965

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{1289}}^1$

素因数の和:1412

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 5242475

約数列:

[1, 5, 47, 71, 235, 355, 1289, 3337, 6445, 16685, 60583, 91519, 302915, 457595, 4301393, 21506965]

約数ペア:

[(1, 21506965), (5, 4301393), (47, 457595), (71, 302915), (235, 91519), (355, 60583), (1289, 16685), (3337, 6445)]