178720209

素因数分解:

$3^3\times {\mathrm{163}}^1\times {\mathrm{40609}}^1$

素因数の和:40781

約数の個数: 16

約数和(自身を含む): 266401600

約数和(自身を除く): 87681391

約数列:

[1, 3, 9, 27, 163, 489, 1467, 4401, 40609, 121827, 365481, 1096443, 6619267, 19857801, 59573403, 178720209]

約数ペア:

[(1, 178720209), (3, 59573403), (9, 19857801), (27, 6619267), (163, 1096443), (489, 365481), (1467, 121827), (4401, 40609)]