21855790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{198689}}^1$

素因数の和:198707

約数の個数: 16

約数和(自身を含む): 42917040

約数和(自身を除く): 21061250

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 198689, 397378, 993445, 1986890, 2185579, 4371158, 10927895, 21855790]

約数ペア:

[(1, 21855790), (2, 10927895), (5, 4371158), (10, 2185579), (11, 1986890), (22, 993445), (55, 397378), (110, 198689)]