20284820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{229}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 44204160

約数和(自身を除く): 23919340

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 103, 172, 206, 215, 229, 412, 430, 458, 515, 860, 916, 1030, 1145, 2060, 2290, 4429, 4580, 8858, 9847, 17716, 19694, 22145, 23587, 39388, 44290, 47174, 49235, 88580, 94348, 98470, 117935, 196940, 235870, 471740, 1014241, 2028482, 4056964, 5071205, 10142410, 20284820]

約数ペア:

[(1, 20284820), (2, 10142410), (4, 5071205), (5, 4056964), (10, 2028482), (20, 1014241), (43, 471740), (86, 235870), (103, 196940), (172, 117935), (206, 98470), (215, 94348), (229, 88580), (412, 49235), (430, 47174), (458, 44290), (515, 39388), (860, 23587), (916, 22145), (1030, 19694), (1145, 17716), (2060, 9847), (2290, 8858), (4429, 4580)]