20915540

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6661}}^1$

素因数の和:6827

約数の個数: 24

約数和(自身を含む): 44209032

約数和(自身を除く): 23293492

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6661, 13322, 26644, 33305, 66610, 133220, 1045777, 2091554, 4183108, 5228885, 10457770, 20915540]

約数ペア:

[(1, 20915540), (2, 10457770), (4, 5228885), (5, 4183108), (10, 2091554), (20, 1045777), (157, 133220), (314, 66610), (628, 33305), (785, 26644), (1570, 13322), (3140, 6661)]