81269181

素因数分解:

$3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{7127}}^1$

素因数の和:7321

約数の個数: 24

約数和(自身を含む): 134918784

約数和(自身を除く): 53649603

約数列:

[1, 3, 7, 9, 21, 63, 181, 543, 1267, 1629, 3801, 7127, 11403, 21381, 49889, 64143, 149667, 449001, 1289987, 3869961, 9029909, 11609883, 27089727, 81269181]

約数ペア:

[(1, 81269181), (3, 27089727), (7, 11609883), (9, 9029909), (21, 3869961), (63, 1289987), (181, 449001), (543, 149667), (1267, 64143), (1629, 49889), (3801, 21381), (7127, 11403)]