21020800

素因数分解:

$2^7\times 5^2\times {\mathrm{6569}}^1$

素因数の和:6593

約数の個数: 48

約数和(自身を含む): 51935850

約数和(自身を除く): 30915050

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 640, 800, 1600, 3200, 6569, 13138, 26276, 32845, 52552, 65690, 105104, 131380, 164225, 210208, 262760, 328450, 420416, 525520, 656900, 840832, 1051040, 1313800, 2102080, 2627600, 4204160, 5255200, 10510400, 21020800]

約数ペア:

[(1, 21020800), (2, 10510400), (4, 5255200), (5, 4204160), (8, 2627600), (10, 2102080), (16, 1313800), (20, 1051040), (25, 840832), (32, 656900), (40, 525520), (50, 420416), (64, 328450), (80, 262760), (100, 210208), (128, 164225), (160, 131380), (200, 105104), (320, 65690), (400, 52552), (640, 32845), (800, 26276), (1600, 13138), (3200, 6569)]