21108556

素因数分解:

$2^2\times 7^1\times {\mathrm{191}}^1\times {\mathrm{3947}}^1$

素因数の和:4149

約数の個数: 24

約数和(自身を含む): 42448896

約数和(自身を除く): 21340340

約数列:

[1, 2, 4, 7, 14, 28, 191, 382, 764, 1337, 2674, 3947, 5348, 7894, 15788, 27629, 55258, 110516, 753877, 1507754, 3015508, 5277139, 10554278, 21108556]

約数ペア:

[(1, 21108556), (2, 10554278), (4, 5277139), (7, 3015508), (14, 1507754), (28, 753877), (191, 110516), (382, 55258), (764, 27629), (1337, 15788), (2674, 7894), (3947, 5348)]