256985165

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{647}}^1$

素因数の和:821

約数の個数: 32

約数和(自身を含む): 336856320

約数和(自身を除く): 79871155

約数列:

[1, 5, 19, 37, 95, 113, 185, 565, 647, 703, 2147, 3235, 3515, 4181, 10735, 12293, 20905, 23939, 61465, 73111, 79439, 119695, 365555, 397195, 454841, 1389109, 2274205, 2705107, 6945545, 13525535, 51397033, 256985165]

約数ペア:

[(1, 256985165), (5, 51397033), (19, 13525535), (37, 6945545), (95, 2705107), (113, 2274205), (185, 1389109), (565, 454841), (647, 397195), (703, 365555), (2147, 119695), (3235, 79439), (3515, 73111), (4181, 61465), (10735, 23939), (12293, 20905)]