20809745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^2$

素因数の和:233

約数の個数: 24

約数和(自身を含む): 28009152

約数和(自身を除く): 7199407

約数列:

[1, 5, 11, 55, 71, 73, 355, 365, 781, 803, 3905, 4015, 5183, 5329, 25915, 26645, 57013, 58619, 285065, 293095, 378359, 1891795, 4161949, 20809745]

約数ペア:

[(1, 20809745), (5, 4161949), (11, 1891795), (55, 378359), (71, 293095), (73, 285065), (355, 58619), (365, 57013), (781, 26645), (803, 25915), (3905, 5329), (4015, 5183)]