21724456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{208889}}^1$

素因数の和:208908

約数の個数: 16

約数和(自身を含む): 43866900

約数和(自身を除く): 22142444

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 208889, 417778, 835556, 1671112, 2715557, 5431114, 10862228, 21724456]

約数ペア:

[(1, 21724456), (2, 10862228), (4, 5431114), (8, 2715557), (13, 1671112), (26, 835556), (52, 417778), (104, 208889)]