21369447

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{211}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 36090880

約数和(自身を除く): 14721433

約数列:

[1, 3, 9, 11, 27, 31, 33, 93, 99, 121, 211, 279, 297, 341, 363, 633, 837, 1023, 1089, 1899, 2321, 3069, 3267, 3751, 5697, 6541, 6963, 9207, 11253, 19623, 20889, 25531, 33759, 58869, 62667, 71951, 76593, 101277, 176607, 215853, 229779, 647559, 689337, 791461, 1942677, 2374383, 7123149, 21369447]

約数ペア:

[(1, 21369447), (3, 7123149), (9, 2374383), (11, 1942677), (27, 791461), (31, 689337), (33, 647559), (93, 229779), (99, 215853), (121, 176607), (211, 101277), (279, 76593), (297, 71951), (341, 62667), (363, 58869), (633, 33759), (837, 25531), (1023, 20889), (1089, 19623), (1899, 11253), (2321, 9207), (3069, 6963), (3267, 6541), (3751, 5697)]