81316220

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{6151}}^1$

素因数の和:6821

約数の個数: 24

約数和(自身を含む): 171050208

約数和(自身を除く): 89733988

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 6151, 6610, 12302, 13220, 24604, 30755, 61510, 123020, 4065811, 8131622, 16263244, 20329055, 40658110, 81316220]

約数ペア:

[(1, 81316220), (2, 40658110), (4, 20329055), (5, 16263244), (10, 8131622), (20, 4065811), (661, 123020), (1322, 61510), (2644, 30755), (3305, 24604), (6151, 13220), (6610, 12302)]