18989271

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4129}}^1$

素因数の和:4215

約数の個数: 24

約数和(自身を含む): 31784480

約数和(自身を除く): 12795209

約数列:

[1, 3, 7, 9, 21, 63, 73, 219, 511, 657, 1533, 4129, 4599, 12387, 28903, 37161, 86709, 260127, 301417, 904251, 2109919, 2712753, 6329757, 18989271]

約数ペア:

[(1, 18989271), (3, 6329757), (7, 2712753), (9, 2109919), (21, 904251), (63, 301417), (73, 260127), (219, 86709), (511, 37161), (657, 28903), (1533, 12387), (4129, 4599)]