21389804

素因数分解:

$2^2\times {\mathrm{103}}^1\times {\mathrm{193}}^1\times {\mathrm{269}}^1$

素因数の和:569

約数の個数: 24

約数和(自身を含む): 38132640

約数和(自身を除く): 16742836

約数列:

[1, 2, 4, 103, 193, 206, 269, 386, 412, 538, 772, 1076, 19879, 27707, 39758, 51917, 55414, 79516, 103834, 110828, 207668, 5347451, 10694902, 21389804]

約数ペア:

[(1, 21389804), (2, 10694902), (4, 5347451), (103, 207668), (193, 110828), (206, 103834), (269, 79516), (386, 55414), (412, 51917), (538, 39758), (772, 27707), (1076, 19879)]