20009620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{439}}^1$

素因数の和:544

約数の個数: 48

約数和(自身を含む): 43908480

約数和(自身を除く): 23898860

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 86, 106, 172, 212, 215, 265, 430, 439, 530, 860, 878, 1060, 1756, 2195, 2279, 4390, 4558, 8780, 9116, 11395, 18877, 22790, 23267, 37754, 45580, 46534, 75508, 93068, 94385, 116335, 188770, 232670, 377540, 465340, 1000481, 2000962, 4001924, 5002405, 10004810, 20009620]

約数ペア:

[(1, 20009620), (2, 10004810), (4, 5002405), (5, 4001924), (10, 2000962), (20, 1000481), (43, 465340), (53, 377540), (86, 232670), (106, 188770), (172, 116335), (212, 94385), (215, 93068), (265, 75508), (430, 46534), (439, 45580), (530, 37754), (860, 23267), (878, 22790), (1060, 18877), (1756, 11395), (2195, 9116), (2279, 8780), (4390, 4558)]