21143661

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 36312192

約数和(自身を除く): 15168531

約数列:

[1, 3, 7, 11, 21, 33, 53, 77, 121, 157, 159, 231, 363, 371, 471, 583, 847, 1099, 1113, 1727, 1749, 2541, 3297, 4081, 5181, 6413, 8321, 12089, 12243, 18997, 19239, 24963, 36267, 44891, 56991, 58247, 91531, 132979, 134673, 174741, 274593, 398937, 640717, 1006841, 1922151, 3020523, 7047887, 21143661]

約数ペア:

[(1, 21143661), (3, 7047887), (7, 3020523), (11, 1922151), (21, 1006841), (33, 640717), (53, 398937), (77, 274593), (121, 174741), (157, 134673), (159, 132979), (231, 91531), (363, 58247), (371, 56991), (471, 44891), (583, 36267), (847, 24963), (1099, 19239), (1113, 18997), (1727, 12243), (1749, 12089), (2541, 8321), (3297, 6413), (4081, 5181)]