21080392

素因数分解:

$2^3\times {\mathrm{103}}^1\times {\mathrm{25583}}^1$

素因数の和:25692

約数の個数: 16

約数和(自身を含む): 39911040

約数和(自身を除く): 18830648

約数列:

[1, 2, 4, 8, 103, 206, 412, 824, 25583, 51166, 102332, 204664, 2635049, 5270098, 10540196, 21080392]

約数ペア:

[(1, 21080392), (2, 10540196), (4, 5270098), (8, 2635049), (103, 204664), (206, 102332), (412, 51166), (824, 25583)]