20902540

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11743}}^1$

素因数の和:11841

約数の個数: 24

約数和(自身を含む): 44392320

約数和(自身を除く): 23489780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11743, 23486, 46972, 58715, 117430, 234860, 1045127, 2090254, 4180508, 5225635, 10451270, 20902540]

約数ペア:

[(1, 20902540), (2, 10451270), (4, 5225635), (5, 4180508), (10, 2090254), (20, 1045127), (89, 234860), (178, 117430), (356, 58715), (445, 46972), (890, 23486), (1780, 11743)]