18966218

素因数分解:

$2^1\times {\mathrm{19}}^2\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:390

約数の個数: 24

約数和(自身を含む): 30426660

約数和(自身を除く): 11460442

約数列:

[1, 2, 19, 38, 109, 218, 241, 361, 482, 722, 2071, 4142, 4579, 9158, 26269, 39349, 52538, 78698, 87001, 174002, 499111, 998222, 9483109, 18966218]

約数ペア:

[(1, 18966218), (2, 9483109), (19, 998222), (38, 499111), (109, 174002), (218, 87001), (241, 78698), (361, 52538), (482, 39349), (722, 26269), (2071, 9158), (4142, 4579)]