77981985

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{409}}^1$

素因数の和:662

約数の個数: 48

約数和(自身を含む): 143270400

約数和(自身を除く): 65288415

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 223, 285, 409, 669, 855, 1115, 1227, 2007, 2045, 3345, 3681, 4237, 6135, 7771, 10035, 12711, 18405, 21185, 23313, 38133, 38855, 63555, 69939, 91207, 116565, 190665, 273621, 349695, 456035, 820863, 1368105, 1732933, 4104315, 5198799, 8664665, 15596397, 25993995, 77981985]

約数ペア:

[(1, 77981985), (3, 25993995), (5, 15596397), (9, 8664665), (15, 5198799), (19, 4104315), (45, 1732933), (57, 1368105), (95, 820863), (171, 456035), (223, 349695), (285, 273621), (409, 190665), (669, 116565), (855, 91207), (1115, 69939), (1227, 63555), (2007, 38855), (2045, 38133), (3345, 23313), (3681, 21185), (4237, 18405), (6135, 12711), (7771, 10035)]