81157780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{368899}}^1$

素因数の和:368919

約数の個数: 24

約数和(自身を含む): 185925600

約数和(自身を除く): 104767820

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 368899, 737798, 1475596, 1844495, 3688990, 4057889, 7377980, 8115778, 16231556, 20289445, 40578890, 81157780]

約数ペア:

[(1, 81157780), (2, 40578890), (4, 20289445), (5, 16231556), (10, 8115778), (11, 7377980), (20, 4057889), (22, 3688990), (44, 1844495), (55, 1475596), (110, 737798), (220, 368899)]