21993957

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{331}}^1$

素因数の和:470

約数の個数: 32

約数和(自身を含む): 34421760

約数和(自身を除く): 12427803

約数列:

[1, 3, 9, 23, 27, 69, 107, 207, 321, 331, 621, 963, 993, 2461, 2889, 2979, 7383, 7613, 8937, 22149, 22839, 35417, 66447, 68517, 106251, 205551, 318753, 814591, 956259, 2443773, 7331319, 21993957]

約数ペア:

[(1, 21993957), (3, 7331319), (9, 2443773), (23, 956259), (27, 814591), (69, 318753), (107, 205551), (207, 106251), (321, 68517), (331, 66447), (621, 35417), (963, 22839), (993, 22149), (2461, 8937), (2889, 7613), (2979, 7383)]