20881399

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2039}}^1$

素因数の和:2083

約数の個数: 24

約数和(自身を含む): 27907200

約数和(自身を除く): 7025801

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 539, 931, 1463, 2039, 10241, 14273, 22429, 38741, 99911, 157003, 271187, 426151, 1099021, 1898309, 2983057, 20881399]

約数ペア:

[(1, 20881399), (7, 2983057), (11, 1898309), (19, 1099021), (49, 426151), (77, 271187), (133, 157003), (209, 99911), (539, 38741), (931, 22429), (1463, 14273), (2039, 10241)]