21741555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{337}}^1$

素因数の和:396

約数の個数: 64

約数和(自身を含む): 42052608

約数和(自身を除く): 20311053

約数列:

[1, 3, 5, 11, 15, 17, 23, 33, 51, 55, 69, 85, 115, 165, 187, 253, 255, 337, 345, 391, 561, 759, 935, 1011, 1173, 1265, 1685, 1955, 2805, 3707, 3795, 4301, 5055, 5729, 5865, 7751, 11121, 12903, 17187, 18535, 21505, 23253, 28645, 38755, 55605, 63019, 64515, 85261, 85935, 116265, 131767, 189057, 255783, 315095, 395301, 426305, 658835, 945285, 1278915, 1449437, 1976505, 4348311, 7247185, 21741555]

約数ペア:

[(1, 21741555), (3, 7247185), (5, 4348311), (11, 1976505), (15, 1449437), (17, 1278915), (23, 945285), (33, 658835), (51, 426305), (55, 395301), (69, 315095), (85, 255783), (115, 189057), (165, 131767), (187, 116265), (253, 85935), (255, 85261), (337, 64515), (345, 63019), (391, 55605), (561, 38755), (759, 28645), (935, 23253), (1011, 21505), (1173, 18535), (1265, 17187), (1685, 12903), (1955, 11121), (2805, 7751), (3707, 5865), (3795, 5729), (4301, 5055)]