20516800

素因数分解:

$2^6\times 5^2\times {\mathrm{12823}}^1$

素因数の和:12845

約数の個数: 42

約数和(自身を含む): 50488088

約数和(自身を除く): 29971288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12823, 25646, 51292, 64115, 102584, 128230, 205168, 256460, 320575, 410336, 512920, 641150, 820672, 1025840, 1282300, 2051680, 2564600, 4103360, 5129200, 10258400, 20516800]

約数ペア:

[(1, 20516800), (2, 10258400), (4, 5129200), (5, 4103360), (8, 2564600), (10, 2051680), (16, 1282300), (20, 1025840), (25, 820672), (32, 641150), (40, 512920), (50, 410336), (64, 320575), (80, 256460), (100, 205168), (160, 128230), (200, 102584), (320, 64115), (400, 51292), (800, 25646), (1600, 12823)]