172940440

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{16823}}^1$

素因数の和:17091

約数の個数: 32

約数和(自身を含む): 390653280

約数和(自身を除く): 217712840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 16823, 33646, 67292, 84115, 134584, 168230, 336460, 672920, 4323511, 8647022, 17294044, 21617555, 34588088, 43235110, 86470220, 172940440]

約数ペア:

[(1, 172940440), (2, 86470220), (4, 43235110), (5, 34588088), (8, 21617555), (10, 17294044), (20, 8647022), (40, 4323511), (257, 672920), (514, 336460), (1028, 168230), (1285, 134584), (2056, 84115), (2570, 67292), (5140, 33646), (10280, 16823)]