77720380

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{5879}}^1$

素因数の和:6549

約数の個数: 24

約数和(自身を含む): 163487520

約数和(自身を除く): 85767140

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 5879, 6610, 11758, 13220, 23516, 29395, 58790, 117580, 3886019, 7772038, 15544076, 19430095, 38860190, 77720380]

約数ペア:

[(1, 77720380), (2, 38860190), (4, 19430095), (5, 15544076), (10, 7772038), (20, 3886019), (661, 117580), (1322, 58790), (2644, 29395), (3305, 23516), (5879, 13220), (6610, 11758)]