21402868

素因数分解:

$2^2\times {\mathrm{157}}^1\times {\mathrm{173}}^1\times {\mathrm{197}}^1$

素因数の和:531

約数の個数: 24

約数和(自身を含む): 38103912

約数和(自身を除く): 16701044

約数列:

[1, 2, 4, 157, 173, 197, 314, 346, 394, 628, 692, 788, 27161, 30929, 34081, 54322, 61858, 68162, 108644, 123716, 136324, 5350717, 10701434, 21402868]

約数ペア:

[(1, 21402868), (2, 10701434), (4, 5350717), (157, 136324), (173, 123716), (197, 108644), (314, 68162), (346, 61858), (394, 54322), (628, 34081), (692, 30929), (788, 27161)]