638538552

素因数分解:

$2^3\times 3^4\times {\mathrm{985399}}^1$

素因数の和:985417

約数の個数: 40

約数和(自身を含む): 1788501000

約数和(自身を除く): 1149962448

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648, 985399, 1970798, 2956197, 3941596, 5912394, 7883192, 8868591, 11824788, 17737182, 23649576, 26605773, 35474364, 53211546, 70948728, 79817319, 106423092, 159634638, 212846184, 319269276, 638538552]

約数ペア:

[(1, 638538552), (2, 319269276), (3, 212846184), (4, 159634638), (6, 106423092), (8, 79817319), (9, 70948728), (12, 53211546), (18, 35474364), (24, 26605773), (27, 23649576), (36, 17737182), (54, 11824788), (72, 8868591), (81, 7883192), (108, 5912394), (162, 3941596), (216, 2956197), (324, 1970798), (648, 985399)]