21508940

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1627}}^1$

素因数の和:2297

約数の個数: 24

約数和(自身を含む): 45264912

約数和(自身を除く): 23755972

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1627, 2644, 3254, 3305, 6508, 6610, 8135, 13220, 16270, 32540, 1075447, 2150894, 4301788, 5377235, 10754470, 21508940]

約数ペア:

[(1, 21508940), (2, 10754470), (4, 5377235), (5, 4301788), (10, 2150894), (20, 1075447), (661, 32540), (1322, 16270), (1627, 13220), (2644, 8135), (3254, 6610), (3305, 6508)]