20775820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79907}}^1$

素因数の和:79929

約数の個数: 24

約数和(自身を含む): 46985904

約数和(自身を除く): 26210084

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79907, 159814, 319628, 399535, 799070, 1038791, 1598140, 2077582, 4155164, 5193955, 10387910, 20775820]

約数ペア:

[(1, 20775820), (2, 10387910), (4, 5193955), (5, 4155164), (10, 2077582), (13, 1598140), (20, 1038791), (26, 799070), (52, 399535), (65, 319628), (130, 159814), (260, 79907)]