81285136

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{118147}}^1$

素因数の和:118198

約数の個数: 20

約数和(自身を含む): 161153872

約数和(自身を除く): 79868736

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 118147, 236294, 472588, 945176, 1890352, 5080321, 10160642, 20321284, 40642568, 81285136]

約数ペア:

[(1, 81285136), (2, 40642568), (4, 20321284), (8, 10160642), (16, 5080321), (43, 1890352), (86, 945176), (172, 472588), (344, 236294), (688, 118147)]