207871280

素因数分解:

$2^4\times 5^1\times {\mathrm{661}}^1\times {\mathrm{3931}}^1$

素因数の和:4605

約数の個数: 40

約数和(自身を含む): 484155024

約数和(自身を除く): 276283744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 661, 1322, 2644, 3305, 3931, 5288, 6610, 7862, 10576, 13220, 15724, 19655, 26440, 31448, 39310, 52880, 62896, 78620, 157240, 314480, 2598391, 5196782, 10393564, 12991955, 20787128, 25983910, 41574256, 51967820, 103935640, 207871280]

約数ペア:

[(1, 207871280), (2, 103935640), (4, 51967820), (5, 41574256), (8, 25983910), (10, 20787128), (16, 12991955), (20, 10393564), (40, 5196782), (80, 2598391), (661, 314480), (1322, 157240), (2644, 78620), (3305, 62896), (3931, 52880), (5288, 39310), (6610, 31448), (7862, 26440), (10576, 19655), (13220, 15724)]