21397456

素因数分解:

$2^4\times {\mathrm{101}}^1\times {\mathrm{13241}}^1$

素因数の和:13350

約数の個数: 20

約数和(自身を含む): 41871204

約数和(自身を除く): 20473748

約数列:

[1, 2, 4, 8, 16, 101, 202, 404, 808, 1616, 13241, 26482, 52964, 105928, 211856, 1337341, 2674682, 5349364, 10698728, 21397456]

約数ペア:

[(1, 21397456), (2, 10698728), (4, 5349364), (8, 2674682), (16, 1337341), (101, 211856), (202, 105928), (404, 52964), (808, 26482), (1616, 13241)]