21509872

素因数分解:

$2^4\times {\mathrm{257}}^1\times {\mathrm{5231}}^1$

素因数の和:5496

約数の個数: 20

約数和(自身を含む): 41845536

約数和(自身を除く): 20335664

約数列:

[1, 2, 4, 8, 16, 257, 514, 1028, 2056, 4112, 5231, 10462, 20924, 41848, 83696, 1344367, 2688734, 5377468, 10754936, 21509872]

約数ペア:

[(1, 21509872), (2, 10754936), (4, 5377468), (8, 2688734), (16, 1344367), (257, 83696), (514, 41848), (1028, 20924), (2056, 10462), (4112, 5231)]