21781912

素因数分解:

$2^3\times {\mathrm{503}}^1\times {\mathrm{5413}}^1$

素因数の和:5922

約数の個数: 16

約数和(自身を含む): 40929840

約数和(自身を除く): 19147928

約数列:

[1, 2, 4, 8, 503, 1006, 2012, 4024, 5413, 10826, 21652, 43304, 2722739, 5445478, 10890956, 21781912]

約数ペア:

[(1, 21781912), (2, 10890956), (4, 5445478), (8, 2722739), (503, 43304), (1006, 21652), (2012, 10826), (4024, 5413)]