21395495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{5479}}^1$

素因数の和:5566

約数の個数: 16

約数和(自身を含む): 28408320

約数和(自身を除く): 7012825

約数列:

[1, 5, 11, 55, 71, 355, 781, 3905, 5479, 27395, 60269, 301345, 389009, 1945045, 4279099, 21395495]

約数ペア:

[(1, 21395495), (5, 4279099), (11, 1945045), (55, 389009), (71, 301345), (355, 60269), (781, 27395), (3905, 5479)]