21083865

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127781}}^1$

素因数の和:127800

約数の個数: 16

約数和(自身を含む): 36801216

約数和(自身を除く): 15717351

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 127781, 383343, 638905, 1405591, 1916715, 4216773, 7027955, 21083865]

約数ペア:

[(1, 21083865), (3, 7027955), (5, 4216773), (11, 1916715), (15, 1405591), (33, 638905), (55, 383343), (165, 127781)]