20557009

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1\times {\mathrm{421}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 23577984

約数和(自身を除く): 3020975

約数列:

[1, 11, 23, 193, 253, 421, 2123, 4439, 4631, 9683, 48829, 81253, 106513, 893783, 1868819, 20557009]

約数ペア:

[(1, 20557009), (11, 1868819), (23, 893783), (193, 106513), (253, 81253), (421, 48829), (2123, 9683), (4439, 4631)]