20987982

素因数分解:

$2^1\times 3^2\times {\mathrm{41}}^1\times {\mathrm{28439}}^1$

素因数の和:28488

約数の個数: 24

約数和(自身を含む): 46584720

約数和(自身を除く): 25596738

約数列:

[1, 2, 3, 6, 9, 18, 41, 82, 123, 246, 369, 738, 28439, 56878, 85317, 170634, 255951, 511902, 1165999, 2331998, 3497997, 6995994, 10493991, 20987982]

約数ペア:

[(1, 20987982), (2, 10493991), (3, 6995994), (6, 3497997), (9, 2331998), (18, 1165999), (41, 511902), (82, 255951), (123, 170634), (246, 85317), (369, 56878), (738, 28439)]