678976

素因数分解:

$2^6\times {\mathrm{103}}^2$

素因数の和:218

約数の個数: 21

約数和(自身を含む): 1360551

約数和(自身を除く): 681575

約数列:

[1, 2, 4, 8, 16, 32, 64, 103, 206, 412, 824, 1648, 3296, 6592, 10609, 21218, 42436, 84872, 169744, 339488, 678976]

約数ペア:

[(1, 678976), (2, 339488), (4, 169744), (8, 84872), (16, 42436), (32, 21218), (64, 10609), (103, 6592), (206, 3296), (412, 1648)]