21204865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{22679}}^1$

素因数の和:22712

約数の個数: 16

約数和(自身を含む): 29393280

約数和(自身を除く): 8188415

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 22679, 113395, 249469, 385543, 1247345, 1927715, 4240973, 21204865]

約数ペア:

[(1, 21204865), (5, 4240973), (11, 1927715), (17, 1247345), (55, 385543), (85, 249469), (187, 113395), (935, 22679)]