81231605

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{178531}}^1$

素因数の和:178556

約数の個数: 16

約数和(自身を含む): 119973504

約数和(自身を除く): 38741899

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 178531, 892655, 1249717, 2320903, 6248585, 11604515, 16246321, 81231605]

約数ペア:

[(1, 81231605), (5, 16246321), (7, 11604515), (13, 6248585), (35, 2320903), (65, 1249717), (91, 892655), (455, 178531)]