18816921

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{193}}^1$

素因数の和:382

約数の個数: 32

約数和(自身を含む): 29425920

約数和(自身を除く): 10608999

約数列:

[1, 3, 9, 23, 27, 69, 157, 193, 207, 471, 579, 621, 1413, 1737, 3611, 4239, 4439, 5211, 10833, 13317, 30301, 32499, 39951, 90903, 97497, 119853, 272709, 696923, 818127, 2090769, 6272307, 18816921]

約数ペア:

[(1, 18816921), (3, 6272307), (9, 2090769), (23, 818127), (27, 696923), (69, 272709), (157, 119853), (193, 97497), (207, 90903), (471, 39951), (579, 32499), (621, 30301), (1413, 13317), (1737, 10833), (3611, 5211), (4239, 4439)]