1639401985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{42821}}^1$

素因数の和:42889

約数の個数: 32

約数和(自身を含む): 2302110720

約数和(自身を除く): 662708735

約数列:

[1, 5, 13, 19, 31, 65, 95, 155, 247, 403, 589, 1235, 2015, 2945, 7657, 38285, 42821, 214105, 556673, 813599, 1327451, 2783365, 4067995, 6637255, 10576787, 17256863, 25221569, 52883935, 86284315, 126107845, 327880397, 1639401985]

約数ペア:

[(1, 1639401985), (5, 327880397), (13, 126107845), (19, 86284315), (31, 52883935), (65, 25221569), (95, 17256863), (155, 10576787), (247, 6637255), (403, 4067995), (589, 2783365), (1235, 1327451), (2015, 813599), (2945, 556673), (7657, 214105), (38285, 42821)]