21572001

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:136

約数の個数: 60

約数和(自身を含む): 37078272

約数和(自身を除く): 15506271

約数列:

[1, 3, 9, 11, 27, 31, 33, 71, 81, 93, 99, 121, 213, 279, 297, 341, 363, 639, 781, 837, 891, 1023, 1089, 1917, 2201, 2343, 2511, 3069, 3267, 3751, 5751, 6603, 7029, 8591, 9207, 9801, 11253, 19809, 21087, 24211, 25773, 27621, 33759, 59427, 63261, 72633, 77319, 101277, 178281, 217899, 231957, 266321, 303831, 653697, 695871, 798963, 1961091, 2396889, 7190667, 21572001]

約数ペア:

[(1, 21572001), (3, 7190667), (9, 2396889), (11, 1961091), (27, 798963), (31, 695871), (33, 653697), (71, 303831), (81, 266321), (93, 231957), (99, 217899), (121, 178281), (213, 101277), (279, 77319), (297, 72633), (341, 63261), (363, 59427), (639, 33759), (781, 27621), (837, 25773), (891, 24211), (1023, 21087), (1089, 19809), (1917, 11253), (2201, 9801), (2343, 9207), (2511, 8591), (3069, 7029), (3267, 6603), (3751, 5751)]