81015790

素因数分解:

$2^1\times 5^1\times {\mathrm{397}}^1\times {\mathrm{20407}}^1$

素因数の和:20811

約数の個数: 16

約数和(自身を含む): 146202912

約数和(自身を除く): 65187122

約数列:

[1, 2, 5, 10, 397, 794, 1985, 3970, 20407, 40814, 102035, 204070, 8101579, 16203158, 40507895, 81015790]

約数ペア:

[(1, 81015790), (2, 40507895), (5, 16203158), (10, 8101579), (397, 204070), (794, 102035), (1985, 40814), (3970, 20407)]