640917

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:153

約数の個数: 24

約数和(自身を含む): 1010880

約数和(自身を除く): 369963

約数列:

[1, 3, 9, 17, 51, 59, 71, 153, 177, 213, 531, 639, 1003, 1207, 3009, 3621, 4189, 9027, 10863, 12567, 37701, 71213, 213639, 640917]

約数ペア:

[(1, 640917), (3, 213639), (9, 71213), (17, 37701), (51, 12567), (59, 10863), (71, 9027), (153, 4189), (177, 3621), (213, 3009), (531, 1207), (639, 1003)]