21725847

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{331}}^1$

素因数の和:381

約数の個数: 64

約数和(自身を含む): 40158720

約数和(自身を除く): 18432873

約数列:

[1, 3, 9, 11, 13, 17, 27, 33, 39, 51, 99, 117, 143, 153, 187, 221, 297, 331, 351, 429, 459, 561, 663, 993, 1287, 1683, 1989, 2431, 2979, 3641, 3861, 4303, 5049, 5627, 5967, 7293, 8937, 10923, 12909, 16881, 21879, 32769, 38727, 47333, 50643, 61897, 65637, 73151, 98307, 116181, 141999, 151929, 185691, 219453, 425997, 557073, 658359, 804661, 1277991, 1671219, 1975077, 2413983, 7241949, 21725847]

約数ペア:

[(1, 21725847), (3, 7241949), (9, 2413983), (11, 1975077), (13, 1671219), (17, 1277991), (27, 804661), (33, 658359), (39, 557073), (51, 425997), (99, 219453), (117, 185691), (143, 151929), (153, 141999), (187, 116181), (221, 98307), (297, 73151), (331, 65637), (351, 61897), (429, 50643), (459, 47333), (561, 38727), (663, 32769), (993, 21879), (1287, 16881), (1683, 12909), (1989, 10923), (2431, 8937), (2979, 7293), (3641, 5967), (3861, 5627), (4303, 5049)]