21504640

素因数分解:

$2^7\times 5^1\times {\mathrm{33601}}^1$

素因数の和:33620

約数の個数: 32

約数和(自身を含む): 51411060

約数和(自身を除く): 29906420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33601, 67202, 134404, 168005, 268808, 336010, 537616, 672020, 1075232, 1344040, 2150464, 2688080, 4300928, 5376160, 10752320, 21504640]

約数ペア:

[(1, 21504640), (2, 10752320), (4, 5376160), (5, 4300928), (8, 2688080), (10, 2150464), (16, 1344040), (20, 1075232), (32, 672020), (40, 537616), (64, 336010), (80, 268808), (128, 168005), (160, 134404), (320, 67202), (640, 33601)]