81991640

素因数分解:

$2^3\times 5^1\times {\mathrm{2049791}}^1$

素因数の和:2049802

約数の個数: 16

約数和(自身を含む): 184481280

約数和(自身を除く): 102489640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2049791, 4099582, 8199164, 10248955, 16398328, 20497910, 40995820, 81991640]

約数ペア:

[(1, 81991640), (2, 40995820), (4, 20497910), (5, 16398328), (8, 10248955), (10, 8199164), (20, 4099582), (40, 2049791)]