16978021221

素因数分解:

$3^1\times 7^2\times {\mathrm{115496743}}^1$

素因数の和:115496760

約数の個数: 12

約数和(自身を含む): 26333257632

約数和(自身を除く): 9355236411

約数列:

[1, 3, 7, 21, 49, 147, 115496743, 346490229, 808477201, 2425431603, 5659340407, 16978021221]

約数ペア:

[(1, 16978021221), (3, 5659340407), (7, 2425431603), (21, 808477201), (49, 346490229), (147, 115496743)]