81640415

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{1523}}^1$

素因数の和:1750

約数の個数: 16

約数和(自身を含む): 100071936

約数和(自身を除く): 18431521

約数列:

[1, 5, 71, 151, 355, 755, 1523, 7615, 10721, 53605, 108133, 229973, 540665, 1149865, 16328083, 81640415]

約数ペア:

[(1, 81640415), (5, 16328083), (71, 1149865), (151, 540665), (355, 229973), (755, 108133), (1523, 53605), (7615, 10721)]