9951980

素因数分解:

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

素因数の和:5689

約数の個数: 24

約数和(自身を含む): 21137760

約数和(自身を除く): 11185780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 5591, 11182, 22364, 27955, 55910, 111820, 497599, 995198, 1990396, 2487995, 4975990, 9951980]

約数ペア:

[(1, 9951980), (2, 4975990), (4, 2487995), (5, 1990396), (10, 995198), (20, 497599), (89, 111820), (178, 55910), (356, 27955), (445, 22364), (890, 11182), (1780, 5591)]