21726639

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:380

約数の個数: 36

約数和(自身を含む): 35105616

約数和(自身を除く): 13378977

約数列:

[1, 3, 9, 11, 33, 71, 99, 121, 213, 281, 363, 639, 781, 843, 1089, 2343, 2529, 3091, 7029, 8591, 9273, 19951, 25773, 27819, 34001, 59853, 77319, 102003, 179559, 219461, 306009, 658383, 1975149, 2414071, 7242213, 21726639]

約数ペア:

[(1, 21726639), (3, 7242213), (9, 2414071), (11, 1975149), (33, 658383), (71, 306009), (99, 219461), (121, 179559), (213, 102003), (281, 77319), (363, 59853), (639, 34001), (781, 27819), (843, 25773), (1089, 19951), (2343, 9273), (2529, 8591), (3091, 7029)]