21126831

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^2\times {\mathrm{127}}^1$

素因数の和:283

約数の個数: 24

約数和(自身を含む): 31414272

約数和(自身を除く): 10287441

約数列:

[1, 3, 11, 33, 71, 127, 213, 381, 781, 1397, 2343, 4191, 5041, 9017, 15123, 27051, 55451, 99187, 166353, 297561, 640207, 1920621, 7042277, 21126831]

約数ペア:

[(1, 21126831), (3, 7042277), (11, 1920621), (33, 640207), (71, 297561), (127, 166353), (213, 99187), (381, 55451), (781, 27051), (1397, 15123), (2343, 9017), (4191, 5041)]