20991432012

素因数分解:

$2^2\times 3^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1\times {\mathrm{38317}}^1$

素因数の和:39038

約数の個数: 48

約数和(自身を含む): 49748412672

約数和(自身を除く): 28756980660

約数列:

[1, 2, 3, 4, 6, 12, 71, 142, 213, 284, 426, 643, 852, 1286, 1929, 2572, 3858, 7716, 38317, 45653, 76634, 91306, 114951, 136959, 153268, 182612, 229902, 273918, 459804, 547836, 2720507, 5441014, 8161521, 10882028, 16323042, 24637831, 32646084, 49275662, 73913493, 98551324, 147826986, 295653972, 1749286001, 3498572002, 5247858003, 6997144004, 10495716006, 20991432012]

約数ペア:

[(1, 20991432012), (2, 10495716006), (3, 6997144004), (4, 5247858003), (6, 3498572002), (12, 1749286001), (71, 295653972), (142, 147826986), (213, 98551324), (284, 73913493), (426, 49275662), (643, 32646084), (852, 24637831), (1286, 16323042), (1929, 10882028), (2572, 8161521), (3858, 5441014), (7716, 2720507), (38317, 547836), (45653, 459804), (76634, 273918), (91306, 229902), (114951, 182612), (136959, 153268)]