21123836

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{643}}^1$

素因数の和:881

約数の個数: 24

約数和(自身を含む): 38083584

約数和(自身を除く): 16959748

約数列:

[1, 2, 4, 43, 86, 172, 191, 382, 643, 764, 1286, 2572, 8213, 16426, 27649, 32852, 55298, 110596, 122813, 245626, 491252, 5280959, 10561918, 21123836]

約数ペア:

[(1, 21123836), (2, 10561918), (4, 5280959), (43, 491252), (86, 245626), (172, 122813), (191, 110596), (382, 55298), (643, 32852), (764, 27649), (1286, 16426), (2572, 8213)]