1561804

素因数分解:

$2^2\times {\mathrm{53}}^2\times {\mathrm{139}}^1$

素因数の和:249

約数の個数: 18

約数和(自身を含む): 2805740

約数和(自身を除く): 1243936

約数列:

[1, 2, 4, 53, 106, 139, 212, 278, 556, 2809, 5618, 7367, 11236, 14734, 29468, 390451, 780902, 1561804]

約数ペア:

[(1, 1561804), (2, 780902), (4, 390451), (53, 29468), (106, 14734), (139, 11236), (212, 7367), (278, 5618), (556, 2809)]