20289820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16631}}^1$

素因数の和:16701

約数の個数: 24

約数和(自身を含む): 43309728

約数和(自身を除く): 23019908

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16631, 33262, 66524, 83155, 166310, 332620, 1014491, 2028982, 4057964, 5072455, 10144910, 20289820]

約数ペア:

[(1, 20289820), (2, 10144910), (4, 5072455), (5, 4057964), (10, 2028982), (20, 1014491), (61, 332620), (122, 166310), (244, 83155), (305, 66524), (610, 33262), (1220, 16631)]