21181816

素因数分解:

$2^3\times {\mathrm{571}}^1\times {\mathrm{4637}}^1$

素因数の和:5214

約数の個数: 16

約数和(自身を含む): 39794040

約数和(自身を除く): 18612224

約数列:

[1, 2, 4, 8, 571, 1142, 2284, 4568, 4637, 9274, 18548, 37096, 2647727, 5295454, 10590908, 21181816]

約数ペア:

[(1, 21181816), (2, 10590908), (4, 5295454), (8, 2647727), (571, 37096), (1142, 18548), (2284, 9274), (4568, 4637)]