21198639

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{563}}^1$

素因数の和:747

約数の個数: 32

約数和(自身を含む): 35518464

約数和(自身を除く): 14319825

約数列:

[1, 3, 7, 11, 21, 33, 77, 163, 231, 489, 563, 1141, 1689, 1793, 3423, 3941, 5379, 6193, 11823, 12551, 18579, 37653, 43351, 91769, 130053, 275307, 642383, 1009459, 1927149, 3028377, 7066213, 21198639]

約数ペア:

[(1, 21198639), (3, 7066213), (7, 3028377), (11, 1927149), (21, 1009459), (33, 642383), (77, 275307), (163, 130053), (231, 91769), (489, 43351), (563, 37653), (1141, 18579), (1689, 12551), (1793, 11823), (3423, 6193), (3941, 5379)]