128127280

素因数分解:

$2^4\times 5^1\times {\mathrm{1601591}}^1$

素因数の和:1601604

約数の個数: 20

約数和(自身を含む): 297896112

約数和(自身を除く): 169768832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1601591, 3203182, 6406364, 8007955, 12812728, 16015910, 25625456, 32031820, 64063640, 128127280]

約数ペア:

[(1, 128127280), (2, 64063640), (4, 32031820), (5, 25625456), (8, 16015910), (10, 12812728), (16, 8007955), (20, 6406364), (40, 3203182), (80, 1601591)]