20516870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^2$

素因数の和:197

約数の個数: 48

約数和(自身を含む): 41967504

約数和(自身を除く): 21450634

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 71, 74, 110, 142, 185, 355, 370, 407, 710, 781, 814, 1562, 2035, 2627, 3905, 4070, 5041, 5254, 7810, 10082, 13135, 25205, 26270, 28897, 50410, 55451, 57794, 110902, 144485, 186517, 277255, 288970, 373034, 554510, 932585, 1865170, 2051687, 4103374, 10258435, 20516870]

約数ペア:

[(1, 20516870), (2, 10258435), (5, 4103374), (10, 2051687), (11, 1865170), (22, 932585), (37, 554510), (55, 373034), (71, 288970), (74, 277255), (110, 186517), (142, 144485), (185, 110902), (355, 57794), (370, 55451), (407, 50410), (710, 28897), (781, 26270), (814, 25205), (1562, 13135), (2035, 10082), (2627, 7810), (3905, 5254), (4070, 5041)]