20905686

素因数分解:

$2^1\times 3^2\times {\mathrm{503}}^1\times {\mathrm{2309}}^1$

素因数の和:2820

約数の個数: 24

約数和(自身を含む): 45405360

約数和(自身を除く): 24499674

約数列:

[1, 2, 3, 6, 9, 18, 503, 1006, 1509, 2309, 3018, 4527, 4618, 6927, 9054, 13854, 20781, 41562, 1161427, 2322854, 3484281, 6968562, 10452843, 20905686]

約数ペア:

[(1, 20905686), (2, 10452843), (3, 6968562), (6, 3484281), (9, 2322854), (18, 1161427), (503, 41562), (1006, 20781), (1509, 13854), (2309, 9054), (3018, 6927), (4527, 4618)]