21886775

素因数分解:

$5^2\times {\mathrm{31}}^2\times {\mathrm{911}}^1$

素因数の和:983

約数の個数: 18

約数和(自身を含む): 28074096

約数和(自身を除く): 6187321

約数列:

[1, 5, 25, 31, 155, 775, 911, 961, 4555, 4805, 22775, 24025, 28241, 141205, 706025, 875471, 4377355, 21886775]

約数ペア:

[(1, 21886775), (5, 4377355), (25, 875471), (31, 706025), (155, 141205), (775, 28241), (911, 24025), (961, 22775), (4555, 4805)]