638990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:212

約数の個数: 32

約数和(自身を含む): 1296864

約数和(自身を除く): 657874

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 74, 110, 157, 185, 314, 370, 407, 785, 814, 1570, 1727, 2035, 3454, 4070, 5809, 8635, 11618, 17270, 29045, 58090, 63899, 127798, 319495, 638990]

約数ペア:

[(1, 638990), (2, 319495), (5, 127798), (10, 63899), (11, 58090), (22, 29045), (37, 17270), (55, 11618), (74, 8635), (110, 5809), (157, 4070), (185, 3454), (314, 2035), (370, 1727), (407, 1570), (785, 814)]