18878800

素因数分解:

$2^4\times 5^2\times {\mathrm{109}}^1\times {\mathrm{433}}^1$

素因数の和:560

約数の個数: 60

約数和(自身を含む): 45878140

約数和(自身を除く): 26999340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 109, 200, 218, 400, 433, 436, 545, 866, 872, 1090, 1732, 1744, 2165, 2180, 2725, 3464, 4330, 4360, 5450, 6928, 8660, 8720, 10825, 10900, 17320, 21650, 21800, 34640, 43300, 43600, 47197, 86600, 94394, 173200, 188788, 235985, 377576, 471970, 755152, 943940, 1179925, 1887880, 2359850, 3775760, 4719700, 9439400, 18878800]

約数ペア:

[(1, 18878800), (2, 9439400), (4, 4719700), (5, 3775760), (8, 2359850), (10, 1887880), (16, 1179925), (20, 943940), (25, 755152), (40, 471970), (50, 377576), (80, 235985), (100, 188788), (109, 173200), (200, 94394), (218, 86600), (400, 47197), (433, 43600), (436, 43300), (545, 34640), (866, 21800), (872, 21650), (1090, 17320), (1732, 10900), (1744, 10825), (2165, 8720), (2180, 8660), (2725, 6928), (3464, 5450), (4330, 4360)]