20728510

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{463}}^1$

素因数の和:529

約数の個数: 48

約数和(自身を含む): 42211008

約数和(自身を除く): 21482498

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 74, 110, 121, 185, 242, 370, 407, 463, 605, 814, 926, 1210, 2035, 2315, 4070, 4477, 4630, 5093, 8954, 10186, 17131, 22385, 25465, 34262, 44770, 50930, 56023, 85655, 112046, 171310, 188441, 280115, 376882, 560230, 942205, 1884410, 2072851, 4145702, 10364255, 20728510]

約数ペア:

[(1, 20728510), (2, 10364255), (5, 4145702), (10, 2072851), (11, 1884410), (22, 942205), (37, 560230), (55, 376882), (74, 280115), (110, 188441), (121, 171310), (185, 112046), (242, 85655), (370, 56023), (407, 50930), (463, 44770), (605, 34262), (814, 25465), (926, 22385), (1210, 17131), (2035, 10186), (2315, 8954), (4070, 5093), (4477, 4630)]