21209804

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{68863}}^1$

素因数の和:68885

約数の個数: 24

約数和(自身を含む): 46276608

約数和(自身を除く): 25066804

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 68863, 137726, 275452, 482041, 757493, 964082, 1514986, 1928164, 3029972, 5302451, 10604902, 21209804]

約数ペア:

[(1, 21209804), (2, 10604902), (4, 5302451), (7, 3029972), (11, 1928164), (14, 1514986), (22, 964082), (28, 757493), (44, 482041), (77, 275452), (154, 137726), (308, 68863)]