21424640

素因数分解:

$2^9\times 5^1\times {\mathrm{8369}}^1$

素因数の和:8392

約数の個数: 40

約数和(自身を含む): 51375060

約数和(自身を除く): 29950420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8369, 16738, 33476, 41845, 66952, 83690, 133904, 167380, 267808, 334760, 535616, 669520, 1071232, 1339040, 2142464, 2678080, 4284928, 5356160, 10712320, 21424640]

約数ペア:

[(1, 21424640), (2, 10712320), (4, 5356160), (5, 4284928), (8, 2678080), (10, 2142464), (16, 1339040), (20, 1071232), (32, 669520), (40, 535616), (64, 334760), (80, 267808), (128, 167380), (160, 133904), (256, 83690), (320, 66952), (512, 41845), (640, 33476), (1280, 16738), (2560, 8369)]