28157605

素因数分解:

$5^1\times 7^2\times {\mathrm{281}}^1\times {\mathrm{409}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 39542040

約数和(自身を除く): 11384435

約数列:

[1, 5, 7, 35, 49, 245, 281, 409, 1405, 1967, 2045, 2863, 9835, 13769, 14315, 20041, 68845, 100205, 114929, 574645, 804503, 4022515, 5631521, 28157605]

約数ペア:

[(1, 28157605), (5, 5631521), (7, 4022515), (35, 804503), (49, 574645), (245, 114929), (281, 100205), (409, 68845), (1405, 20041), (1967, 14315), (2045, 13769), (2863, 9835)]