21057916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{478589}}^1$

素因数の和:478604

約数の個数: 12

約数和(自身を含む): 40201560

約数和(自身を除く): 19143644

約数列:

[1, 2, 4, 11, 22, 44, 478589, 957178, 1914356, 5264479, 10528958, 21057916]

約数ペア:

[(1, 21057916), (2, 10528958), (4, 5264479), (11, 1914356), (22, 957178), (44, 478589)]