20999517

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90907}}^1$

素因数の和:90928

約数の個数: 16

約数和(自身を含む): 34908672

約数和(自身を除く): 13909155

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90907, 272721, 636349, 999977, 1909047, 2999931, 6999839, 20999517]

約数ペア:

[(1, 20999517), (3, 6999839), (7, 2999931), (11, 1909047), (21, 999977), (33, 636349), (77, 272721), (231, 90907)]