21957047

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{613}}^1$

素因数の和:687

約数の個数: 24

約数和(自身を含む): 27718416

約数和(自身を除く): 5761369

約数列:

[1, 7, 17, 43, 49, 119, 301, 613, 731, 833, 2107, 4291, 5117, 10421, 26359, 30037, 35819, 72947, 184513, 448103, 510629, 1291591, 3136721, 21957047]

約数ペア:

[(1, 21957047), (7, 3136721), (17, 1291591), (43, 510629), (49, 448103), (119, 184513), (301, 72947), (613, 35819), (731, 30037), (833, 26359), (2107, 10421), (4291, 5117)]