21895918

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:720

約数の個数: 24

約数和(自身を含む): 36379224

約数和(自身を除く): 14483306

約数列:

[1, 2, 11, 22, 121, 173, 242, 346, 523, 1046, 1903, 3806, 5753, 11506, 20933, 41866, 63283, 90479, 126566, 180958, 995269, 1990538, 10947959, 21895918]

約数ペア:

[(1, 21895918), (2, 10947959), (11, 1990538), (22, 995269), (121, 180958), (173, 126566), (242, 90479), (346, 63283), (523, 41866), (1046, 20933), (1903, 11506), (3806, 5753)]