2780001

素因数分解:

$3^4\times 7^1\times {\mathrm{4903}}^1$

素因数の和:4922

約数の個数: 20

約数和(自身を含む): 4747072

約数和(自身を除く): 1967071

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 4903, 14709, 34321, 44127, 102963, 132381, 308889, 397143, 926667, 2780001]

約数ペア:

[(1, 2780001), (3, 926667), (7, 397143), (9, 308889), (21, 132381), (27, 102963), (63, 44127), (81, 34321), (189, 14709), (567, 4903)]