81179660

素因数分解:

$2^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{21031}}^1$

素因数の和:21233

約数の個数: 24

約数和(自身を含む): 171368736

約数和(自身を除く): 90189076

約数列:

[1, 2, 4, 5, 10, 20, 193, 386, 772, 965, 1930, 3860, 21031, 42062, 84124, 105155, 210310, 420620, 4058983, 8117966, 16235932, 20294915, 40589830, 81179660]

約数ペア:

[(1, 81179660), (2, 40589830), (4, 20294915), (5, 16235932), (10, 8117966), (20, 4058983), (193, 420620), (386, 210310), (772, 105155), (965, 84124), (1930, 42062), (3860, 21031)]