21491368

素因数分解:

$2^3\times {\mathrm{257}}^1\times {\mathrm{10453}}^1$

素因数の和:10716

約数の個数: 16

約数和(自身を含む): 40456980

約数和(自身を除く): 18965612

約数列:

[1, 2, 4, 8, 257, 514, 1028, 2056, 10453, 20906, 41812, 83624, 2686421, 5372842, 10745684, 21491368]

約数ペア:

[(1, 21491368), (2, 10745684), (4, 5372842), (8, 2686421), (257, 83624), (514, 41812), (1028, 20906), (2056, 10453)]