21810305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{1543}}^1$

素因数の和:1816

約数の個数: 16

約数和(自身を含む): 28681344

約数和(自身を除く): 6871039

約数列:

[1, 5, 11, 55, 257, 1285, 1543, 2827, 7715, 14135, 16973, 84865, 396551, 1982755, 4362061, 21810305]

約数ペア:

[(1, 21810305), (5, 4362061), (11, 1982755), (55, 396551), (257, 84865), (1285, 16973), (1543, 14135), (2827, 7715)]