20720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37}}^1$

素因数の和:57

約数の個数: 40

約数和(自身を含む): 56544

約数和(自身を除く): 35824

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 185, 259, 280, 296, 370, 518, 560, 592, 740, 1036, 1295, 1480, 2072, 2590, 2960, 4144, 5180, 10360, 20720]

約数ペア:

[(1, 20720), (2, 10360), (4, 5180), (5, 4144), (7, 2960), (8, 2590), (10, 2072), (14, 1480), (16, 1295), (20, 1036), (28, 740), (35, 592), (37, 560), (40, 518), (56, 370), (70, 296), (74, 280), (80, 259), (112, 185), (140, 148)]