19957360

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2803}}^1$

素因数の和:2905

約数の個数: 40

約数和(自身を含む): 46938960

約数和(自身を除く): 26981600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2803, 3560, 5606, 7120, 11212, 14015, 22424, 28030, 44848, 56060, 112120, 224240, 249467, 498934, 997868, 1247335, 1995736, 2494670, 3991472, 4989340, 9978680, 19957360]

約数ペア:

[(1, 19957360), (2, 9978680), (4, 4989340), (5, 3991472), (8, 2494670), (10, 1995736), (16, 1247335), (20, 997868), (40, 498934), (80, 249467), (89, 224240), (178, 112120), (356, 56060), (445, 44848), (712, 28030), (890, 22424), (1424, 14015), (1780, 11212), (2803, 7120), (3560, 5606)]