1279820

素因数分解:

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

素因数の和:817

約数の個数: 24

約数和(自身を含む): 2721600

約数和(自身を除く): 1441780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 719, 890, 1438, 1780, 2876, 3595, 7190, 14380, 63991, 127982, 255964, 319955, 639910, 1279820]

約数ペア:

[(1, 1279820), (2, 639910), (4, 319955), (5, 255964), (10, 127982), (20, 63991), (89, 14380), (178, 7190), (356, 3595), (445, 2876), (719, 1780), (890, 1438)]