21161968

素因数分解:

$2^4\times {\mathrm{103}}^1\times {\mathrm{12841}}^1$

素因数の和:12952

約数の個数: 20

約数和(自身を含む): 41402608

約数和(自身を除く): 20240640

約数列:

[1, 2, 4, 8, 16, 103, 206, 412, 824, 1648, 12841, 25682, 51364, 102728, 205456, 1322623, 2645246, 5290492, 10580984, 21161968]

約数ペア:

[(1, 21161968), (2, 10580984), (4, 5290492), (8, 2645246), (16, 1322623), (103, 205456), (206, 102728), (412, 51364), (824, 25682), (1648, 12841)]