20519860

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7489}}^1$

素因数の和:7635

約数の個数: 24

約数和(自身を含む): 43412040

約数和(自身を除く): 22892180

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7489, 14978, 29956, 37445, 74890, 149780, 1025993, 2051986, 4103972, 5129965, 10259930, 20519860]

約数ペア:

[(1, 20519860), (2, 10259930), (4, 5129965), (5, 4103972), (10, 2051986), (20, 1025993), (137, 149780), (274, 74890), (548, 37445), (685, 29956), (1370, 14978), (2740, 7489)]