20257055

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{211}}^2$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 30060576

約数和(自身を除く): 9803521

約数列:

[1, 5, 7, 13, 35, 65, 91, 211, 455, 1055, 1477, 2743, 7385, 13715, 19201, 44521, 96005, 222605, 311647, 578773, 1558235, 2893865, 4051411, 20257055]

約数ペア:

[(1, 20257055), (5, 4051411), (7, 2893865), (13, 1558235), (35, 578773), (65, 311647), (91, 222605), (211, 96005), (455, 44521), (1055, 19201), (1477, 13715), (2743, 7385)]