28721721

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{1871}}^1$

素因数の和:1941

約数の個数: 32

約数和(自身を含む): 47443968

約数和(自身を除く): 18722247

約数列:

[1, 3, 7, 17, 21, 43, 51, 119, 129, 301, 357, 731, 903, 1871, 2193, 5117, 5613, 13097, 15351, 31807, 39291, 80453, 95421, 222649, 241359, 563171, 667947, 1367701, 1689513, 4103103, 9573907, 28721721]

約数ペア:

[(1, 28721721), (3, 9573907), (7, 4103103), (17, 1689513), (21, 1367701), (43, 667947), (51, 563171), (119, 241359), (129, 222649), (301, 95421), (357, 80453), (731, 39291), (903, 31807), (1871, 15351), (2193, 13097), (5117, 5613)]