640081617

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{708839}}^1$

素因数の和:708892

約数の個数: 16

約数和(自身を含む): 998046720

約数和(自身を除く): 357965103

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 708839, 2126517, 4961873, 14885619, 30480077, 91440231, 213360539, 640081617]

約数ペア:

[(1, 640081617), (3, 213360539), (7, 91440231), (21, 30480077), (43, 14885619), (129, 4961873), (301, 2126517), (903, 708839)]