20926895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:343

約数の個数: 32

約数和(自身を含む): 29113344

約数和(自身を除く): 8186449

約数列:

[1, 5, 11, 23, 55, 71, 115, 233, 253, 355, 781, 1165, 1265, 1633, 2563, 3905, 5359, 8165, 12815, 16543, 17963, 26795, 58949, 82715, 89815, 181973, 294745, 380489, 909865, 1902445, 4185379, 20926895]

約数ペア:

[(1, 20926895), (5, 4185379), (11, 1902445), (23, 909865), (55, 380489), (71, 294745), (115, 181973), (233, 89815), (253, 82715), (355, 58949), (781, 26795), (1165, 17963), (1265, 16543), (1633, 12815), (2563, 8165), (3905, 5359)]