81817780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{33809}}^1$

素因数の和:33840

約数の個数: 36

約数和(自身を含む): 188862660

約数和(自身を除く): 107044880

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 33809, 67618, 135236, 169045, 338090, 371899, 676180, 743798, 1487596, 1859495, 3718990, 4090889, 7437980, 8181778, 16363556, 20454445, 40908890, 81817780]

約数ペア:

[(1, 81817780), (2, 40908890), (4, 20454445), (5, 16363556), (10, 8181778), (11, 7437980), (20, 4090889), (22, 3718990), (44, 1859495), (55, 1487596), (110, 743798), (121, 676180), (220, 371899), (242, 338090), (484, 169045), (605, 135236), (1210, 67618), (2420, 33809)]