18788517

素因数分解:

$3^7\times {\mathrm{11}}^2\times {\mathrm{71}}^1$

素因数の和:114

約数の個数: 48

約数和(自身を含む): 31409280

約数和(自身を除く): 12620763

約数列:

[1, 3, 9, 11, 27, 33, 71, 81, 99, 121, 213, 243, 297, 363, 639, 729, 781, 891, 1089, 1917, 2187, 2343, 2673, 3267, 5751, 7029, 8019, 8591, 9801, 17253, 21087, 24057, 25773, 29403, 51759, 63261, 77319, 88209, 155277, 189783, 231957, 264627, 569349, 695871, 1708047, 2087613, 6262839, 18788517]

約数ペア:

[(1, 18788517), (3, 6262839), (9, 2087613), (11, 1708047), (27, 695871), (33, 569349), (71, 264627), (81, 231957), (99, 189783), (121, 155277), (213, 88209), (243, 77319), (297, 63261), (363, 51759), (639, 29403), (729, 25773), (781, 24057), (891, 21087), (1089, 17253), (1917, 9801), (2187, 8591), (2343, 8019), (2673, 7029), (3267, 5751)]