21453875.000000000

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{2651729}}^1$

素因数の和:2651748

約数の個数: 16

約数和(自身を含む): 556863300

約数和(自身を除く): 281083484

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 2651729, 5303458, 10606916, 21213832, 34472477, 68944954, 137889908, 275779816]

約数ペア:

[(1, 275779816), (2, 137889908), (4, 68944954), (8, 34472477), (13, 21213832), (26, 10606916), (52, 5303458), (104, 2651729)]