21346985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^3\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 32

約数和(自身を含む): 30067200

約数和(自身を除く): 8720215

約数列:

[1, 5, 11, 17, 55, 79, 85, 187, 289, 395, 869, 935, 1343, 1445, 3179, 4345, 4913, 6715, 14773, 15895, 22831, 24565, 54043, 73865, 114155, 251141, 270215, 388127, 1255705, 1940635, 4269397, 21346985]

約数ペア:

[(1, 21346985), (5, 4269397), (11, 1940635), (17, 1255705), (55, 388127), (79, 270215), (85, 251141), (187, 114155), (289, 73865), (395, 54043), (869, 24565), (935, 22831), (1343, 15895), (1445, 14773), (3179, 6715), (4345, 4913)]