21178180

素因数分解:

$2^2\times 5^1\times {\mathrm{569}}^1\times {\mathrm{1861}}^1$

素因数の和:2439

約数の個数: 24

約数和(自身を含む): 44576280

約数和(自身を除く): 23398100

約数列:

[1, 2, 4, 5, 10, 20, 569, 1138, 1861, 2276, 2845, 3722, 5690, 7444, 9305, 11380, 18610, 37220, 1058909, 2117818, 4235636, 5294545, 10589090, 21178180]

約数ペア:

[(1, 21178180), (2, 10589090), (4, 5294545), (5, 4235636), (10, 2117818), (20, 1058909), (569, 37220), (1138, 18610), (1861, 11380), (2276, 9305), (2845, 7444), (3722, 5690)]