81820820

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{9319}}^1$

素因数の和:9767

約数の個数: 24

約数和(自身を含む): 172233600

約数和(自身を除く): 90412780

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 4390, 8780, 9319, 18638, 37276, 46595, 93190, 186380, 4091041, 8182082, 16364164, 20455205, 40910410, 81820820]

約数ペア:

[(1, 81820820), (2, 40910410), (4, 20455205), (5, 16364164), (10, 8182082), (20, 4091041), (439, 186380), (878, 93190), (1756, 46595), (2195, 37276), (4390, 18638), (8780, 9319)]