20723200

素因数分解:

$2^9\times 5^2\times {\mathrm{1619}}^1$

素因数の和:1647

約数の個数: 60

約数和(自身を含む): 51375060

約数和(自身を除く): 30651860

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1600, 1619, 2560, 3200, 3238, 6400, 6476, 8095, 12800, 12952, 16190, 25904, 32380, 40475, 51808, 64760, 80950, 103616, 129520, 161900, 207232, 259040, 323800, 414464, 518080, 647600, 828928, 1036160, 1295200, 2072320, 2590400, 4144640, 5180800, 10361600, 20723200]

約数ペア:

[(1, 20723200), (2, 10361600), (4, 5180800), (5, 4144640), (8, 2590400), (10, 2072320), (16, 1295200), (20, 1036160), (25, 828928), (32, 647600), (40, 518080), (50, 414464), (64, 323800), (80, 259040), (100, 207232), (128, 161900), (160, 129520), (200, 103616), (256, 80950), (320, 64760), (400, 51808), (512, 40475), (640, 32380), (800, 25904), (1280, 16190), (1600, 12952), (1619, 12800), (2560, 8095), (3200, 6476), (3238, 6400)]