638664856

素因数分解:

$2^3\times {\mathrm{1117}}^1\times {\mathrm{71471}}^1$

素因数の和:72594

約数の個数: 16

約数和(自身を含む): 1198585440

約数和(自身を除く): 559920584

約数列:

[1, 2, 4, 8, 1117, 2234, 4468, 8936, 71471, 142942, 285884, 571768, 79833107, 159666214, 319332428, 638664856]

約数ペア:

[(1, 638664856), (2, 319332428), (4, 159666214), (8, 79833107), (1117, 571768), (2234, 285884), (4468, 142942), (8936, 71471)]