21091611

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{1493}}^1$

素因数の和:1790

約数の個数: 16

約数和(自身を含む): 29903904

約数和(自身を除く): 8812293

約数列:

[1, 3, 17, 51, 277, 831, 1493, 4479, 4709, 14127, 25381, 76143, 413561, 1240683, 7030537, 21091611]

約数ペア:

[(1, 21091611), (3, 7030537), (17, 1240683), (51, 413561), (277, 76143), (831, 25381), (1493, 14127), (4479, 4709)]