19903960

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5591}}^1$

素因数の和:5691

約数の個数: 32

約数和(自身を含む): 45295200

約数和(自身を除く): 25391240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5591, 11182, 22364, 27955, 44728, 55910, 111820, 223640, 497599, 995198, 1990396, 2487995, 3980792, 4975990, 9951980, 19903960]

約数ペア:

[(1, 19903960), (2, 9951980), (4, 4975990), (5, 3980792), (8, 2487995), (10, 1990396), (20, 995198), (40, 497599), (89, 223640), (178, 111820), (356, 55910), (445, 44728), (712, 27955), (890, 22364), (1780, 11182), (3560, 5591)]