21931585

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{4271}}^1$

素因数の和:4368

約数の個数: 16

約数和(自身を含む): 28707840

約数和(自身を除く): 6776255

約数列:

[1, 5, 13, 65, 79, 395, 1027, 4271, 5135, 21355, 55523, 277615, 337409, 1687045, 4386317, 21931585]

約数ペア:

[(1, 21931585), (5, 4386317), (13, 1687045), (65, 337409), (79, 277615), (395, 55523), (1027, 21355), (4271, 5135)]