28881215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 42439680

約数和(自身を除く): 13558465

約数列:

[1, 5, 11, 17, 23, 55, 79, 85, 115, 187, 253, 289, 391, 395, 869, 935, 1265, 1343, 1445, 1817, 1955, 3179, 4301, 4345, 6647, 6715, 9085, 14773, 15895, 19987, 21505, 22831, 30889, 33235, 73117, 73865, 99935, 114155, 154445, 251141, 339779, 365585, 525113, 1255705, 1698895, 2625565, 5776243, 28881215]

約数ペア:

[(1, 28881215), (5, 5776243), (11, 2625565), (17, 1698895), (23, 1255705), (55, 525113), (79, 365585), (85, 339779), (115, 251141), (187, 154445), (253, 114155), (289, 99935), (391, 73865), (395, 73117), (869, 33235), (935, 30889), (1265, 22831), (1343, 21505), (1445, 19987), (1817, 15895), (1955, 14773), (3179, 9085), (4301, 6715), (4345, 6647)]