639910

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{719}}^1$

素因数の和:815

約数の個数: 16

約数和(自身を含む): 1166400

約数和(自身を除く): 526490

約数列:

[1, 2, 5, 10, 89, 178, 445, 719, 890, 1438, 3595, 7190, 63991, 127982, 319955, 639910]

約数ペア:

[(1, 639910), (2, 319955), (5, 127982), (10, 63991), (89, 7190), (178, 3595), (445, 1438), (719, 890)]