21018004

素因数分解:

$2^2\times 7^1\times {\mathrm{421}}^1\times {\mathrm{1783}}^1$

素因数の和:2215

約数の個数: 24

約数和(自身を含む): 42159488

約数和(自身を除く): 21141484

約数列:

[1, 2, 4, 7, 14, 28, 421, 842, 1684, 1783, 2947, 3566, 5894, 7132, 11788, 12481, 24962, 49924, 750643, 1501286, 3002572, 5254501, 10509002, 21018004]

約数ペア:

[(1, 21018004), (2, 10509002), (4, 5254501), (7, 3002572), (14, 1501286), (28, 750643), (421, 49924), (842, 24962), (1684, 12481), (1783, 11788), (2947, 7132), (3566, 5894)]