28878005

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 39984000

約数和(自身を除く): 11105995

約数列:

[1, 5, 13, 19, 65, 67, 95, 247, 335, 349, 871, 1235, 1273, 1745, 4355, 4537, 6365, 6631, 16549, 22685, 23383, 33155, 82745, 86203, 116915, 303979, 431015, 444277, 1519895, 2221385, 5775601, 28878005]

約数ペア:

[(1, 28878005), (5, 5775601), (13, 2221385), (19, 1519895), (65, 444277), (67, 431015), (95, 303979), (247, 116915), (335, 86203), (349, 82745), (871, 33155), (1235, 23383), (1273, 22685), (1745, 16549), (4355, 6631), (4537, 6365)]