20839780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80153}}^1$

素因数の和:80175

約数の個数: 24

約数和(自身を含む): 47130552

約数和(自身を除く): 26290772

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80153, 160306, 320612, 400765, 801530, 1041989, 1603060, 2083978, 4167956, 5209945, 10419890, 20839780]

約数ペア:

[(1, 20839780), (2, 10419890), (4, 5209945), (5, 4167956), (10, 2083978), (13, 1603060), (20, 1041989), (26, 801530), (52, 400765), (65, 320612), (130, 160306), (260, 80153)]