649773

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:145

約数の個数: 24

約数和(自身を含む): 1015872

約数和(自身を除く): 366099

約数列:

[1, 3, 9, 23, 43, 69, 73, 129, 207, 219, 387, 657, 989, 1679, 2967, 3139, 5037, 8901, 9417, 15111, 28251, 72197, 216591, 649773]

約数ペア:

[(1, 649773), (3, 216591), (9, 72197), (23, 28251), (43, 15111), (69, 9417), (73, 8901), (129, 5037), (207, 3139), (219, 2967), (387, 1679), (657, 989)]