18319820

素因数分解:

$2^2\times 5^1\times {\mathrm{915991}}^1$

素因数の和:916000

約数の個数: 12

約数和(自身を含む): 38471664

約数和(自身を除く): 20151844

約数列:

[1, 2, 4, 5, 10, 20, 915991, 1831982, 3663964, 4579955, 9159910, 18319820]

約数ペア:

[(1, 18319820), (2, 9159910), (4, 4579955), (5, 3663964), (10, 1831982), (20, 915991)]