9978680

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2803}}^1$

素因数の和:2903

約数の個数: 32

約数和(自身を含む): 22712400

約数和(自身を除く): 12733720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 2803, 3560, 5606, 11212, 14015, 22424, 28030, 56060, 112120, 249467, 498934, 997868, 1247335, 1995736, 2494670, 4989340, 9978680]

約数ペア:

[(1, 9978680), (2, 4989340), (4, 2494670), (5, 1995736), (8, 1247335), (10, 997868), (20, 498934), (40, 249467), (89, 112120), (178, 56060), (356, 28030), (445, 22424), (712, 14015), (890, 11212), (1780, 5606), (2803, 3560)]