18186721

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:181

約数の個数: 32

約数和(自身を含む): 23113728

約数和(自身を除く): 4927007

約数列:

[1, 7, 23, 37, 43, 71, 161, 259, 301, 497, 851, 989, 1591, 1633, 2627, 3053, 5957, 6923, 11137, 11431, 18389, 21371, 36593, 60421, 70219, 112961, 256151, 422947, 491533, 790727, 2598103, 18186721]

約数ペア:

[(1, 18186721), (7, 2598103), (23, 790727), (37, 491533), (43, 422947), (71, 256151), (161, 112961), (259, 70219), (301, 60421), (497, 36593), (851, 21371), (989, 18389), (1591, 11431), (1633, 11137), (2627, 6923), (3053, 5957)]