87979990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{409}}^1\times {\mathrm{439}}^1$

素因数の和:869

約数の個数: 48

約数和(自身を含む): 185090400

約数和(自身を除く): 97110410

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 409, 439, 490, 818, 878, 2045, 2195, 2863, 3073, 4090, 4390, 5726, 6146, 14315, 15365, 20041, 21511, 28630, 30730, 40082, 43022, 100205, 107555, 179551, 200410, 215110, 359102, 897755, 1256857, 1795510, 2513714, 6284285, 8797999, 12568570, 17595998, 43989995, 87979990]

約数ペア:

[(1, 87979990), (2, 43989995), (5, 17595998), (7, 12568570), (10, 8797999), (14, 6284285), (35, 2513714), (49, 1795510), (70, 1256857), (98, 897755), (245, 359102), (409, 215110), (439, 200410), (490, 179551), (818, 107555), (878, 100205), (2045, 43022), (2195, 40082), (2863, 30730), (3073, 28630), (4090, 21511), (4390, 20041), (5726, 15365), (6146, 14315)]