28720517

素因数分解:

$7^2\times {\mathrm{43}}^2\times {\mathrm{317}}^1$

素因数の和:417

約数の個数: 18

約数和(自身を含む): 34312518

約数和(自身を除く): 5592001

約数列:

[1, 7, 43, 49, 301, 317, 1849, 2107, 2219, 12943, 13631, 15533, 90601, 95417, 586133, 667919, 4102931, 28720517]

約数ペア:

[(1, 28720517), (7, 4102931), (43, 667919), (49, 586133), (301, 95417), (317, 90601), (1849, 15533), (2107, 13631), (2219, 12943)]