21136865

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{5783}}^1$

素因数の和:5848

約数の個数: 16

約数和(自身を含む): 27485568

約数和(自身を除く): 6348703

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 5783, 28915, 98311, 248669, 491555, 1243345, 4227373, 21136865]

約数ペア:

[(1, 21136865), (5, 4227373), (17, 1243345), (43, 491555), (85, 248669), (215, 98311), (731, 28915), (3655, 5783)]