20001205

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{1583}}^1$

素因数の和:1633

約数の個数: 24

約数和(自身を含む): 28968192

約数和(自身を除く): 8966987

約数列:

[1, 5, 7, 19, 35, 95, 133, 361, 665, 1583, 1805, 2527, 7915, 11081, 12635, 30077, 55405, 150385, 210539, 571463, 1052695, 2857315, 4000241, 20001205]

約数ペア:

[(1, 20001205), (5, 4000241), (7, 2857315), (19, 1052695), (35, 571463), (95, 210539), (133, 150385), (361, 55405), (665, 30077), (1583, 12635), (1805, 11081), (2527, 7915)]