21131623149

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{247301}}^1$

素因数の和:247637

約数の個数: 32

約数和(自身を含む): 34788466944

約数和(自身を除く): 13656843795

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 313, 939, 2191, 4069, 6573, 12207, 28483, 85449, 247301, 741903, 1731107, 3214913, 5193321, 9644739, 22504391, 67513173, 77405213, 232215639, 541836491, 1006267769, 1625509473, 3018803307, 7043874383, 21131623149]

約数ペア:

[(1, 21131623149), (3, 7043874383), (7, 3018803307), (13, 1625509473), (21, 1006267769), (39, 541836491), (91, 232215639), (273, 77405213), (313, 67513173), (939, 22504391), (2191, 9644739), (4069, 5193321), (6573, 3214913), (12207, 1731107), (28483, 741903), (85449, 247301)]