21031856

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77323}}^1$

素因数の和:77348

約数の個数: 20

約数和(自身を含む): 43146792

約数和(自身を除く): 22114936

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77323, 154646, 309292, 618584, 1237168, 1314491, 2628982, 5257964, 10515928, 21031856]

約数ペア:

[(1, 21031856), (2, 10515928), (4, 5257964), (8, 2628982), (16, 1314491), (17, 1237168), (34, 618584), (68, 309292), (136, 154646), (272, 77323)]