21499592

素因数分解:

$2^3\times {\mathrm{257}}^1\times {\mathrm{10457}}^1$

素因数の和:10720

約数の個数: 16

約数和(自身を含む): 40472460

約数和(自身を除く): 18972868

約数列:

[1, 2, 4, 8, 257, 514, 1028, 2056, 10457, 20914, 41828, 83656, 2687449, 5374898, 10749796, 21499592]

約数ペア:

[(1, 21499592), (2, 10749796), (4, 5374898), (8, 2687449), (257, 83656), (514, 41828), (1028, 20914), (2056, 10457)]