21290577

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:158

約数の個数: 64

約数和(自身を含む): 37822464

約数和(自身を除く): 16531887

約数列:

[1, 3, 7, 11, 21, 33, 37, 47, 53, 77, 111, 141, 159, 231, 259, 329, 371, 407, 517, 583, 777, 987, 1113, 1221, 1551, 1739, 1749, 1961, 2491, 2849, 3619, 4081, 5217, 5883, 7473, 8547, 10857, 12173, 12243, 13727, 17437, 19129, 21571, 27401, 36519, 41181, 52311, 57387, 64713, 82203, 92167, 133903, 150997, 191807, 276501, 401709, 452991, 575421, 645169, 1013837, 1935507, 3041511, 7096859, 21290577]

約数ペア:

[(1, 21290577), (3, 7096859), (7, 3041511), (11, 1935507), (21, 1013837), (33, 645169), (37, 575421), (47, 452991), (53, 401709), (77, 276501), (111, 191807), (141, 150997), (159, 133903), (231, 92167), (259, 82203), (329, 64713), (371, 57387), (407, 52311), (517, 41181), (583, 36519), (777, 27401), (987, 21571), (1113, 19129), (1221, 17437), (1551, 13727), (1739, 12243), (1749, 12173), (1961, 10857), (2491, 8547), (2849, 7473), (3619, 5883), (4081, 5217)]