20961928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{201557}}^1$

素因数の和:201576

約数の個数: 16

約数和(自身を含む): 42327180

約数和(自身を除く): 21365252

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 201557, 403114, 806228, 1612456, 2620241, 5240482, 10480964, 20961928]

約数ペア:

[(1, 20961928), (2, 10480964), (4, 5240482), (8, 2620241), (13, 1612456), (26, 806228), (52, 403114), (104, 201557)]