20859085

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{439}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 8413235

約数列:

[1, 5, 13, 17, 43, 65, 85, 215, 221, 439, 559, 731, 1105, 2195, 2795, 3655, 5707, 7463, 9503, 18877, 28535, 37315, 47515, 94385, 97019, 245401, 320909, 485095, 1227005, 1604545, 4171817, 20859085]

約数ペア:

[(1, 20859085), (5, 4171817), (13, 1604545), (17, 1227005), (43, 485095), (65, 320909), (85, 245401), (215, 97019), (221, 94385), (439, 47515), (559, 37315), (731, 28535), (1105, 18877), (2195, 9503), (2795, 7463), (3655, 5707)]