2720781

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{2273}}^1$

素因数の和:2305

約数の個数: 24

約数和(自身を含む): 4729920

約数和(自身を除く): 2009139

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 2273, 6819, 15911, 20457, 43187, 47733, 129561, 143199, 302309, 388683, 906927, 2720781]

約数ペア:

[(1, 2720781), (3, 906927), (7, 388683), (9, 302309), (19, 143199), (21, 129561), (57, 47733), (63, 43187), (133, 20457), (171, 15911), (399, 6819), (1197, 2273)]