21108945

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{757}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 39949632

約数和(自身を除く): 18840687

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 65, 143, 165, 169, 195, 429, 507, 715, 757, 845, 1859, 2145, 2271, 2535, 3785, 5577, 8327, 9295, 9841, 11355, 24981, 27885, 29523, 41635, 49205, 108251, 124905, 127933, 147615, 324753, 383799, 541255, 639665, 1407263, 1623765, 1918995, 4221789, 7036315, 21108945]

約数ペア:

[(1, 21108945), (3, 7036315), (5, 4221789), (11, 1918995), (13, 1623765), (15, 1407263), (33, 639665), (39, 541255), (55, 383799), (65, 324753), (143, 147615), (165, 127933), (169, 124905), (195, 108251), (429, 49205), (507, 41635), (715, 29523), (757, 27885), (845, 24981), (1859, 11355), (2145, 9841), (2271, 9295), (2535, 8327), (3785, 5577)]